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Maximize Growth in Small-Scale Cultivation Setups
The ROI-E420 is a full-spectrum LED fixture engineered for hobbyists and professional cultivators working in compact grow spaces. With its sleek frame, proven 3K PAR spectrum, and low-profile design, this 420W fixture delivers high-intensity light without overcrowding your environment.
✔️ Compact Power Output
Covers 4' x 4' veg and 3.5' x 3.5' flower areas with 420W efficiency
💡 3K Full PAR Spectrum
Ideal spectral blend optimized for both veg and bloom stages
📱 Plug-and-Play Simplicity
No apps or extra setup—perfect for beginners and pros
🔌 Low-Profile Build
Sits close to canopy without sacrificing coverage or power
🛡️ Reliable Build Quality
Backed by trusted Growers Choice engineering
🚚 Fast, Free U.S. Shipping
Quick delivery from authorized U.S. warehouses
Growers love the ROI-E420 for its balance of performance and size. Whether you’re running a small indoor tent or need a powerful light for side projects, this unit offers efficiency, full-spectrum output, and an easy-to-use design—without the bulk of larger fixtures.
Low-Profile Frame
The sleek housing design allows close placement to plant canopies, making it ideal for grow tents or vertical setups.
Optimized Full Spectrum
Grower’s Choice’s proven 3K PAR spectrum supports vigorous veg growth and dense flowering for high yields.
Versatile Coverage
Covers up to 4' x 4' in veg and 3.5' x 3.5' in flower, perfect for compact gardens or supplemental lighting.
Grow tents (3' x 3' to 4' x 4')
Home hobby grow setups
Supplemental lighting in larger rooms
Vertical farming systems
Wipe down lens covers every 30 days to maintain PAR output
Avoid exposure to humidity above manufacturer specs
Store in a dry, ventilated area when not in use
💡 Optimize Your Setup with the Growers Choice Master Controller
Take your lighting system to the next level by adding the Growers Choice Master Controller. This dual-zone controller manages up to 200 fixtures, enabling full scheduling, sunrise/sunset simulation, and temperature-based auto dim/shutdown. It's the perfect companion for any ROI Series LED or GC CMH setup—offering safety, scalability, and total control in one compact device.
➡️ Add it to your order today for seamless automation and enhanced performance.
Upgrade your compact grow setup with full-spectrum precision. Order the ROI-E420 today and grow smarter in less space.
1x Growers Choice ROI-E420 LED Fixture
1x Power Cable
1x Mounting Hardware Set
1x User Guide
Model Number: ROI-E420
Light Source: LED
Spectrum: GC-3K Full Phase
PPF: 1090 PPF
Input Power: 420W
Efficacy: 2.6 μmol/J
Fixture Dimension / Weight: 35.3” L x 34.6” W x 3.2” H / 19.4 lbs (89.6 cm L x 88 cm W x 8.1 cm H / 8.8 kg)
Mounting Height: 6”–24” depending on application
Thermal Management: Passive
Max. Ambient Temperature: 104°F / 40°C
Dimming: 0–10V
Light Distribution: 120°
Lifetime: L90 >54,000 hours
Power Factor: >90%
Certifications: UL 8800, UL 1598, IP 65, DLC
Warranty: 5 Years Standard Warranty
Max Amperage by Voltage Service
120V: 4.0A
208V: 2.5A
240V: 2.0A
277V: 1.8A
Q: What size tent does the ROI-E420 work best in?
A: It’s optimized for 4’x4’ veg and 3.5’x3.5’ flower coverage, making it ideal for small tents.
Q: Is this fixture dimmable or app-controlled?
A: This unit does not have app connectivity but features a built-in dimming function via its driver.
Q: What’s in the box?
A: LED fixture, power cable, hanging kit, and user guide.
Q: Can I use this for both veg and bloom?
A: Yes, the 3K full PAR spectrum supports all growth stages.
Q: Does it work with satellite internet?
A: No, Growers Choice fixtures are not designed for use with satellite-based control systems.
Q: What’s the warranty?
A: Backed by a manufacturer warranty (see warranty section below).
5-Year Manufacturer Warranty covering all LED boards, drivers, and components. U.S.-based support included.
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 Policy
Free Shipping Within the Continental U.S.
We offer free shipping on all orders shipped to addresses within the continental United States. There are no hidden fees, minimum order requirements, 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.
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. 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.
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.
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.
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.
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.
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.
Maximize Growth in Small-Scale Cultivation Setups
The ROI-E420 is a full-spectrum LED fixture engineered for hobbyists and professional cultivators working in compact grow spaces. With its sleek frame, proven 3K PAR spectrum, and low-profile design, this 420W fixture delivers high-intensity light without overcrowding your environment.
✔️ Compact Power Output
Covers 4' x 4' veg and 3.5' x 3.5' flower areas with 420W efficiency
💡 3K Full PAR Spectrum
Ideal spectral blend optimized for both veg and bloom stages
📱 Plug-and-Play Simplicity
No apps or extra setup—perfect for beginners and pros
🔌 Low-Profile Build
Sits close to canopy without sacrificing coverage or power
🛡️ Reliable Build Quality
Backed by trusted Growers Choice engineering
🚚 Fast, Free U.S. Shipping
Quick delivery from authorized U.S. warehouses
Growers love the ROI-E420 for its balance of performance and size. Whether you’re running a small indoor tent or need a powerful light for side projects, this unit offers efficiency, full-spectrum output, and an easy-to-use design—without the bulk of larger fixtures.
Low-Profile Frame
The sleek housing design allows close placement to plant canopies, making it ideal for grow tents or vertical setups.
Optimized Full Spectrum
Grower’s Choice’s proven 3K PAR spectrum supports vigorous veg growth and dense flowering for high yields.
Versatile Coverage
Covers up to 4' x 4' in veg and 3.5' x 3.5' in flower, perfect for compact gardens or supplemental lighting.
Grow tents (3' x 3' to 4' x 4')
Home hobby grow setups
Supplemental lighting in larger rooms
Vertical farming systems
Wipe down lens covers every 30 days to maintain PAR output
Avoid exposure to humidity above manufacturer specs
Store in a dry, ventilated area when not in use
💡 Optimize Your Setup with the Growers Choice Master Controller
Take your lighting system to the next level by adding the Growers Choice Master Controller. This dual-zone controller manages up to 200 fixtures, enabling full scheduling, sunrise/sunset simulation, and temperature-based auto dim/shutdown. It's the perfect companion for any ROI Series LED or GC CMH setup—offering safety, scalability, and total control in one compact device.
➡️ Add it to your order today for seamless automation and enhanced performance.
Upgrade your compact grow setup with full-spectrum precision. Order the ROI-E420 today and grow smarter in less space.
1x Growers Choice ROI-E420 LED Fixture
1x Power Cable
1x Mounting Hardware Set
1x User Guide
Model Number: ROI-E420
Light Source: LED
Spectrum: GC-3K Full Phase
PPF: 1090 PPF
Input Power: 420W
Efficacy: 2.6 μmol/J
Fixture Dimension / Weight: 35.3” L x 34.6” W x 3.2” H / 19.4 lbs (89.6 cm L x 88 cm W x 8.1 cm H / 8.8 kg)
Mounting Height: 6”–24” depending on application
Thermal Management: Passive
Max. Ambient Temperature: 104°F / 40°C
Dimming: 0–10V
Light Distribution: 120°
Lifetime: L90 >54,000 hours
Power Factor: >90%
Certifications: UL 8800, UL 1598, IP 65, DLC
Warranty: 5 Years Standard Warranty
Max Amperage by Voltage Service
120V: 4.0A
208V: 2.5A
240V: 2.0A
277V: 1.8A
Q: What size tent does the ROI-E420 work best in?
A: It’s optimized for 4’x4’ veg and 3.5’x3.5’ flower coverage, making it ideal for small tents.
Q: Is this fixture dimmable or app-controlled?
A: This unit does not have app connectivity but features a built-in dimming function via its driver.
Q: What’s in the box?
A: LED fixture, power cable, hanging kit, and user guide.
Q: Can I use this for both veg and bloom?
A: Yes, the 3K full PAR spectrum supports all growth stages.
Q: Does it work with satellite internet?
A: No, Growers Choice fixtures are not designed for use with satellite-based control systems.
Q: What’s the warranty?
A: Backed by a manufacturer warranty (see warranty section below).
5-Year Manufacturer Warranty covering all LED boards, drivers, and components. U.S.-based support included.
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 Policy
Free Shipping Within the Continental U.S.
We offer free shipping on all orders shipped to addresses within the continental United States. There are no hidden fees, minimum order requirements, 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.
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. 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.
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.
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.
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.
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.
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.
