Skip to content

Spider Farmer GlowR40 – 40W Deep Red 660nm Supplemental LED Grow Light

$79.99

Notify me when back in stock

Icon

Free Shipping

On All Orders

Icon

Lowest Price

Guaranteed or We’ll Match It

Icon

No Sales Tax

No Sales Tax—Except in Michigan

Icon

Easy Returns

Always hassle free

Icon

Call Us

(844) 873-5764

Description

Compact Deep Red Spectrum Grow Light for Bloom & Fruiting Stages

Boost your plant growth with the Spider Farmer GlowR40. Designed with 650–665nm deep red diodes, it enhances photosynthesis during flowering and fruiting, leading to stronger plants and higher yields. Compact and versatile, the GlowR40 can be installed horizontally or vertically, making it a perfect supplemental light for setups under 500W.


Spider Farmer GlowR40 hero image

✅ Quick-Glance Benefits

🌹 Deep Red Spectrum 650–665nm diodes enhance flowering, fruiting, and overall plant growth.
40W Total Output Includes 2 light bars (20W each) for targeted supplemental lighting.
🔗 Daisy Chain Ready Link up to 16 bars (110V) or 32 bars (220V) for expanded coverage.
🛠️ Flexible Mounting Can be hung horizontally or vertically to fit any grow space.
🚚 Fast, U.S. Shipping Ships quickly and securely from U.S. warehouses.



What’s Included

  • 2x GlowR40 Light Bars (20W each)

  • Hanging accessories

  • Power cord & daisy chain cables

  • User Manual


Use It For

✔️ Flowering stage boost
✔️ Fruiting enhancement
✔️ Supplemental red spectrum lighting
✔️ Grow setups under 500W


🔍 Standout Features

🌞 Bloom Enhancer Deep red light drives photosynthesis for heavier blooms and fruit sets.
📏 Slim Design Each bar measures just 2.06ft long, fitting easily into compact grow tents.
🔌 Expandable Setup Daisy chain multiple bars for scalable red spectrum coverage.
💡 Under 500W Ready Perfect for SF2000, SF4000, G3000, G4500, SE4500, SE5000, and G5000 setups.


  • Red LED Light Diodes (650-665nm): Utilizing the 650-665nm red light spectrum is crucial for plant growth stages. This specific wavelength of red light has been proven to play a vital role during the flowering and fruiting phases, enhancing yield.
  • IP65 Waterproof Transparent Lampshade: SF-GlowR40 is equipped with an IP65-rated waterproof transparent lampshade, effectively safeguarding LEDs and circuits from moisture impact. This feature ensures normal operation even in high-humidity environments, prolonging the product’s lifespan.
  • Daisy Chain Design:Designed with daisy chain capability. SF-GlowR40 is up to 16 light bars in series at 110V & Up to 32 light bars in series at 220V. SF-GlowR80 is up to 8 light bars in series at 110V & Up to 16 light bars in series at 220V.
  • Multiple Installation Methods: Supporting various installation methods, including bottom, side, under-lighting, and top lighting of tent or room. This flexibility addresses potential issues in plant growth, such as uneven light distribution due to varying plant heights, resulting in improved cultivation outcomes.
 
Glow40-A+_01 Glow40-A+_02 Glow40-A+_03-1 Glow40-A+_03-2 Glow40-A+_03-3 Glow40-A+_03-4 GlowR40-A+_04 GlowR40-A+_5 GlowR40-A+_6

Ready to upgrade your grow setup?

Order the Spider Farmer GlowR40 today and give your plants the deep red spectrum they need for stronger flowering and better yields.


Spider Farmer GlowR40 40W Supplemental Grow Light Specifications

  • Wattage: 40W (20W x 2 bars)

  • Spectrum: 650–665nm deep red

  • Dimensions: 2.06ft × 0.15ft × 0.12ft (per bar)

  • Max Daisy Chain: 16 bars (110V) / 32 bars (220V)

  • Mounting: Horizontal or vertical installation

  • Recommended Use: Supplemental for setups under 500W (SF2000, SF4000, G3000, G4500, SE4500, SE5000, G5000)


Spider Farmer GlowR40 40W Supplemental Grow Light Warranty

  • Manufacturer Warranty: 1 Year

  • Covers defects in materials and workmanship

  • Support handled directly through our team


FAQ

Q: What spectrum does the GlowR40 use?
A: It uses 650–665nm deep red diodes to maximize bloom and fruiting performance.

Q: How many GlowR40 bars can be daisy chained?
A: Up to 16 bars on 110V circuits or 32 bars on 220V circuits.

Q: Is vertical mounting possible?
A: Yes, the GlowR40 can be mounted horizontally or vertically to match your grow layout.

Q: What grow lights pair best with GlowR40?
A: Recommended for setups under 500W, including SF2000, SF4000, G3000, G4500, SE4500, SE5000, and G5000.

Q: Is this only useful in flowering?
A: It’s most beneficial in bloom and fruiting stages, but can be used to supplement at any stage.

Why Buy From US

Who We Are

At Garden GrowShop, we're not a faceless online retailer. We're a small, family-run business with real roots in the growing community. Every product we carry has been carefully chosen to meet the needs of both home growers and commercial operators — because we’ve walked in your shoes.

Personal, Knowledgeable Support
When you reach out to us, you’re not getting a canned reply or being passed between departments. You're talking to someone who actually knows the products, understands your challenges, and is here to help you succeed.

Transparent Pricing — No Gimmicks
We believe in fair, honest pricing. No inflated markups, no bait-and-switch tactics. If you ever find a better price on the same item, let us know — we’ll match it without the hassle.

Fast, Dependable Shipping
We ship directly from warehouses across the U.S. to get your order to you quickly and reliably. No inflated delivery timelines, and no surprise shipping fees — just smooth, on-time delivery you can count on.

A Partnership, Not a Transaction
Our customers stick with us because we treat them like partners. Whether you're outfitting a small indoor setup or managing a large-scale operation, we’re here to grow with you — not just sell you equipment.

Our Commitment
If something goes wrong, we don’t pass the buck. We work with you directly to make it right. That’s how we’ve built our business, and that’s how we plan to keep it.

Shipping/ Returns

Shipping Policy

Free Shipping Within the Continental U.S.

We offer free shipping on all orders over $200 shipped to addresses within the continental United States. Orders under $200 will have shipping calculated at checkout. There are no hidden fees or handling charges. The price you see at checkout is the final price you pay.

Order Processing

Orders are typically processed within 1–2 business days (Monday–Friday). If an item is temporarily backordered or delayed, we’ll notify you by email with an updated shipping estimate.

Shipping Confirmation & Tracking

Once your order has shipped, we’ll email you a shipping confirmation that includes tracking information. You can use this to monitor the delivery status of your package in real time.

Where Orders Ship From

We partner with trusted suppliers and manufacturers who maintain warehouse locations throughout the United States. Orders are typically shipped from the facility closest to your delivery address to ensure faster transit times and greater efficiency. Some orders may ship in multiple packages depending on item availability and warehouse location.

Estimated Delivery Time

Most orders arrive within 3–7 business days of shipping, depending on your location and the item’s warehouse origin. Freight items and oversized packages may take additional time.

Shipping Carriers

We use trusted carriers such as FedEx, UPS, USPS, and professional freight delivery services for large or heavy items. Depending on the size of your order, it may arrive in multiple packages or from multiple warehouses.

Delivery and Moving Disclaimer

Please note: We do not offer moving or installation services. For freight shipments or large items, carriers are only responsible for curbside delivery. Drivers are not required to move items inside your home, up stairs, or to specific locations. We strongly recommend having assistance available at the time of delivery for heavy or bulky shipments.

Address Accuracy & Order Changes

Please ensure your shipping address is correct at the time of checkout. Once an order has shipped, we are unable to change the delivery address or reroute the shipment. If you need to make changes to your order, contact us immediately after placing it.

Damaged or Lost Shipments

If your order arrives damaged or appears to be lost in transit, contact us within 48 hours of delivery (or expected delivery). We will work with the carrier to resolve the issue as quickly as possible.

Shipping Restrictions

We currently ship only to addresses within the continental United States. We do not ship to Alaska, Hawaii, U.S. territories, or international destinations.

Questions?

If you have questions about your order, delivery, or shipping process, feel free to reach out to us through our Contact Us page or via email (sales@gardengrowshop.com ). We’re here to help.

Start of Returns section 

Easy Returns, No Surprises

At Garden GrowShop, we stand behind the quality of every product we carry. But we also understand that sometimes things just don’t work out — and that’s okay. If you change your mind or the item isn’t quite what you expected, we’ve got you covered.

30-Day Return Guarantee

You have 30 days from the date of delivery to request a return for any reason. To start a return, simply email us at sales@gardengrowshop.com with your order number and we’ll walk you through the process.

Here’s what to expect:

  • You’ll receive clear return instructions from our team.

  • Once your item is received and inspected, we’ll issue a refund to your original payment method.

  • Items must be returned in “like new” condition, with all original packaging and accessories.

  • Return shipping costs are the responsibility of the customer.

“Like new” means no visible wear, damage, or missing parts. Items showing signs of use or misuse may not qualify for a refund.


Damaged or Defective Orders

If your order arrives damaged or defective, don’t worry — we’ll take care of it.

Here’s what to do:

  • Note any damage with the delivery driver when signing for the package.

  • Email photos and a description of the issue to sales@gardengrowshop.com on the same day you receive it.

  • We’ll cover the cost of return shipping and make sure a replacement is sent out quickly.

Please keep all original packaging in case a return is needed. This helps speed up the process and ensures a smooth resolution.


Order Cancellations

If you need to cancel your order, please contact us as soon as possible at sales@gardengrowshop.com or by phone.

  • Cancellations before shipment receive a full refund.

  • Cancellations after shipment will follow our standard return policy and may be subject to return shipping costs.


Important Return Notes:

  • Certain products may have brand-specific return restrictions, which will be noted on the product page.

  • Products purchased for temporary or single-use purposes (e.g. trade shows, promotional events) are not eligible for return.


We’re Here to Help

Our goal is to make returns and exchanges as easy as possible — with no stress and no surprises. If you’re unsure whether your order qualifies or just want to ask a question, don’t hesitate to reach out. We’re here to make sure you feel confident before and after your purchase.

Help Us Improve

We’d love to hear from you!
If you decided not to purchase today, we’d like to know what held you back. Your feedback helps us improve and serve you better.

 Was it the price, product description, reviews, shipping options, or something else? Tell us what made you hesitate, and we’ll send you a 5% discount code for your next order (valid on select products).

Why Garden GrowShop?

We’re an authorized dealer for every brand we sell—so you’ll always get full manufacturer warranties, premium support, and authentic gear direct from the source.

✅ Fast, tracked shipping on all orders
✅ 100% safe and secure checkout
✅ No restocking fees on returns
✅ Friendly U.S.-based support when you need it

Have questions? We're here to help. Whether you're just getting started or scaling up a full grow, our experts can guide you to the right gear.

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
Description

Compact Deep Red Spectrum Grow Light for Bloom & Fruiting Stages

Boost your plant growth with the Spider Farmer GlowR40. Designed with 650–665nm deep red diodes, it enhances photosynthesis during flowering and fruiting, leading to stronger plants and higher yields. Compact and versatile, the GlowR40 can be installed horizontally or vertically, making it a perfect supplemental light for setups under 500W.


Spider Farmer GlowR40 hero image

✅ Quick-Glance Benefits

🌹 Deep Red Spectrum 650–665nm diodes enhance flowering, fruiting, and overall plant growth.
40W Total Output Includes 2 light bars (20W each) for targeted supplemental lighting.
🔗 Daisy Chain Ready Link up to 16 bars (110V) or 32 bars (220V) for expanded coverage.
🛠️ Flexible Mounting Can be hung horizontally or vertically to fit any grow space.
🚚 Fast, U.S. Shipping Ships quickly and securely from U.S. warehouses.



What’s Included

  • 2x GlowR40 Light Bars (20W each)

  • Hanging accessories

  • Power cord & daisy chain cables

  • User Manual


Use It For

✔️ Flowering stage boost
✔️ Fruiting enhancement
✔️ Supplemental red spectrum lighting
✔️ Grow setups under 500W


🔍 Standout Features

🌞 Bloom Enhancer Deep red light drives photosynthesis for heavier blooms and fruit sets.
📏 Slim Design Each bar measures just 2.06ft long, fitting easily into compact grow tents.
🔌 Expandable Setup Daisy chain multiple bars for scalable red spectrum coverage.
💡 Under 500W Ready Perfect for SF2000, SF4000, G3000, G4500, SE4500, SE5000, and G5000 setups.


  • Red LED Light Diodes (650-665nm): Utilizing the 650-665nm red light spectrum is crucial for plant growth stages. This specific wavelength of red light has been proven to play a vital role during the flowering and fruiting phases, enhancing yield.
  • IP65 Waterproof Transparent Lampshade: SF-GlowR40 is equipped with an IP65-rated waterproof transparent lampshade, effectively safeguarding LEDs and circuits from moisture impact. This feature ensures normal operation even in high-humidity environments, prolonging the product’s lifespan.
  • Daisy Chain Design:Designed with daisy chain capability. SF-GlowR40 is up to 16 light bars in series at 110V & Up to 32 light bars in series at 220V. SF-GlowR80 is up to 8 light bars in series at 110V & Up to 16 light bars in series at 220V.
  • Multiple Installation Methods: Supporting various installation methods, including bottom, side, under-lighting, and top lighting of tent or room. This flexibility addresses potential issues in plant growth, such as uneven light distribution due to varying plant heights, resulting in improved cultivation outcomes.
 
Glow40-A+_01 Glow40-A+_02 Glow40-A+_03-1 Glow40-A+_03-2 Glow40-A+_03-3 Glow40-A+_03-4 GlowR40-A+_04 GlowR40-A+_5 GlowR40-A+_6

Ready to upgrade your grow setup?

Order the Spider Farmer GlowR40 today and give your plants the deep red spectrum they need for stronger flowering and better yields.


Spider Farmer GlowR40 40W Supplemental Grow Light Specifications

  • Wattage: 40W (20W x 2 bars)

  • Spectrum: 650–665nm deep red

  • Dimensions: 2.06ft × 0.15ft × 0.12ft (per bar)

  • Max Daisy Chain: 16 bars (110V) / 32 bars (220V)

  • Mounting: Horizontal or vertical installation

  • Recommended Use: Supplemental for setups under 500W (SF2000, SF4000, G3000, G4500, SE4500, SE5000, G5000)


Spider Farmer GlowR40 40W Supplemental Grow Light Warranty

  • Manufacturer Warranty: 1 Year

  • Covers defects in materials and workmanship

  • Support handled directly through our team


FAQ

Q: What spectrum does the GlowR40 use?
A: It uses 650–665nm deep red diodes to maximize bloom and fruiting performance.

Q: How many GlowR40 bars can be daisy chained?
A: Up to 16 bars on 110V circuits or 32 bars on 220V circuits.

Q: Is vertical mounting possible?
A: Yes, the GlowR40 can be mounted horizontally or vertically to match your grow layout.

Q: What grow lights pair best with GlowR40?
A: Recommended for setups under 500W, including SF2000, SF4000, G3000, G4500, SE4500, SE5000, and G5000.

Q: Is this only useful in flowering?
A: It’s most beneficial in bloom and fruiting stages, but can be used to supplement at any stage.

Why Buy From US

Who We Are

At Garden GrowShop, we're not a faceless online retailer. We're a small, family-run business with real roots in the growing community. Every product we carry has been carefully chosen to meet the needs of both home growers and commercial operators — because we’ve walked in your shoes.

Personal, Knowledgeable Support
When you reach out to us, you’re not getting a canned reply or being passed between departments. You're talking to someone who actually knows the products, understands your challenges, and is here to help you succeed.

Transparent Pricing — No Gimmicks
We believe in fair, honest pricing. No inflated markups, no bait-and-switch tactics. If you ever find a better price on the same item, let us know — we’ll match it without the hassle.

Fast, Dependable Shipping
We ship directly from warehouses across the U.S. to get your order to you quickly and reliably. No inflated delivery timelines, and no surprise shipping fees — just smooth, on-time delivery you can count on.

A Partnership, Not a Transaction
Our customers stick with us because we treat them like partners. Whether you're outfitting a small indoor setup or managing a large-scale operation, we’re here to grow with you — not just sell you equipment.

Our Commitment
If something goes wrong, we don’t pass the buck. We work with you directly to make it right. That’s how we’ve built our business, and that’s how we plan to keep it.

Shipping/ Returns

Shipping Policy

Free Shipping Within the Continental U.S.

We offer free shipping on all orders over $200 shipped to addresses within the continental United States. Orders under $200 will have shipping calculated at checkout. There are no hidden fees or handling charges. The price you see at checkout is the final price you pay.

Order Processing

Orders are typically processed within 1–2 business days (Monday–Friday). If an item is temporarily backordered or delayed, we’ll notify you by email with an updated shipping estimate.

Shipping Confirmation & Tracking

Once your order has shipped, we’ll email you a shipping confirmation that includes tracking information. You can use this to monitor the delivery status of your package in real time.

Where Orders Ship From

We partner with trusted suppliers and manufacturers who maintain warehouse locations throughout the United States. Orders are typically shipped from the facility closest to your delivery address to ensure faster transit times and greater efficiency. Some orders may ship in multiple packages depending on item availability and warehouse location.

Estimated Delivery Time

Most orders arrive within 3–7 business days of shipping, depending on your location and the item’s warehouse origin. Freight items and oversized packages may take additional time.

Shipping Carriers

We use trusted carriers such as FedEx, UPS, USPS, and professional freight delivery services for large or heavy items. Depending on the size of your order, it may arrive in multiple packages or from multiple warehouses.

Delivery and Moving Disclaimer

Please note: We do not offer moving or installation services. For freight shipments or large items, carriers are only responsible for curbside delivery. Drivers are not required to move items inside your home, up stairs, or to specific locations. We strongly recommend having assistance available at the time of delivery for heavy or bulky shipments.

Address Accuracy & Order Changes

Please ensure your shipping address is correct at the time of checkout. Once an order has shipped, we are unable to change the delivery address or reroute the shipment. If you need to make changes to your order, contact us immediately after placing it.

Damaged or Lost Shipments

If your order arrives damaged or appears to be lost in transit, contact us within 48 hours of delivery (or expected delivery). We will work with the carrier to resolve the issue as quickly as possible.

Shipping Restrictions

We currently ship only to addresses within the continental United States. We do not ship to Alaska, Hawaii, U.S. territories, or international destinations.

Questions?

If you have questions about your order, delivery, or shipping process, feel free to reach out to us through our Contact Us page or via email (sales@gardengrowshop.com ). We’re here to help.

Start of Returns section 

Easy Returns, No Surprises

At Garden GrowShop, we stand behind the quality of every product we carry. But we also understand that sometimes things just don’t work out — and that’s okay. If you change your mind or the item isn’t quite what you expected, we’ve got you covered.

30-Day Return Guarantee

You have 30 days from the date of delivery to request a return for any reason. To start a return, simply email us at sales@gardengrowshop.com with your order number and we’ll walk you through the process.

Here’s what to expect:

  • You’ll receive clear return instructions from our team.

  • Once your item is received and inspected, we’ll issue a refund to your original payment method.

  • Items must be returned in “like new” condition, with all original packaging and accessories.

  • Return shipping costs are the responsibility of the customer.

“Like new” means no visible wear, damage, or missing parts. Items showing signs of use or misuse may not qualify for a refund.


Damaged or Defective Orders

If your order arrives damaged or defective, don’t worry — we’ll take care of it.

Here’s what to do:

  • Note any damage with the delivery driver when signing for the package.

  • Email photos and a description of the issue to sales@gardengrowshop.com on the same day you receive it.

  • We’ll cover the cost of return shipping and make sure a replacement is sent out quickly.

Please keep all original packaging in case a return is needed. This helps speed up the process and ensures a smooth resolution.


Order Cancellations

If you need to cancel your order, please contact us as soon as possible at sales@gardengrowshop.com or by phone.

  • Cancellations before shipment receive a full refund.

  • Cancellations after shipment will follow our standard return policy and may be subject to return shipping costs.


Important Return Notes:

  • Certain products may have brand-specific return restrictions, which will be noted on the product page.

  • Products purchased for temporary or single-use purposes (e.g. trade shows, promotional events) are not eligible for return.


We’re Here to Help

Our goal is to make returns and exchanges as easy as possible — with no stress and no surprises. If you’re unsure whether your order qualifies or just want to ask a question, don’t hesitate to reach out. We’re here to make sure you feel confident before and after your purchase.

Help Us Improve

We’d love to hear from you!
If you decided not to purchase today, we’d like to know what held you back. Your feedback helps us improve and serve you better.

 Was it the price, product description, reviews, shipping options, or something else? Tell us what made you hesitate, and we’ll send you a 5% discount code for your next order (valid on select products).

Why Garden GrowShop?

We’re an authorized dealer for every brand we sell—so you’ll always get full manufacturer warranties, premium support, and authentic gear direct from the source.

✅ Fast, tracked shipping on all orders
✅ 100% safe and secure checkout
✅ No restocking fees on returns
✅ Friendly U.S.-based support when you need it

Have questions? We're here to help. Whether you're just getting started or scaling up a full grow, our experts can guide you to the right gear.