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Buyer's Guide
400W - 600W LED Grow Lights: Complete Guide
The 400W to 600W range is the most popular wattage tier for serious home growers, and for good reason. Fixtures in this bracket cover a 4x4 canopy at the PPFD levels cannabis needs during flower, typically 800 to 1000 micromol per square metre per second at canopy height, while fitting comfortably on a single 15A or 20A 120V circuit. Many 480 to 600W models now exceed 3.0 umol/J, meaning they push as much light as older 600W HPS setups while running cooler and quieter.
The lineup here includes bar lights and quantum boards from Mars Hydro, Spider Farmer, AC Infinity, Photontek, and NextLight. The Mars Hydro FC 4800 EVO and FC-E 4800 are well-matched to 4x4 spaces with proven yield records. The Photontek X 600W Pro and AC Infinity Ionframe EVO6 suit growers who want commercial-grade build quality in a home-grow footprint. Spider Farmer's G5000 adds Bluetooth and WiFi control for schedule automation.
When comparing fixtures in this range, look at the PPF-per-dollar ratio alongside raw efficiency. A 480W bar at 2.9 umol/J running 18 hours per day costs measurably less per gram of yield than a 500W fixture at 2.5 umol/J over a full season. Dimming range also matters: models with 0 to 100% dimming allow you to run lower intensity during veg and ramp up for flower without swapping hardware.
All orders ship free across Canada. For help sizing between a 400W or 600W fixture for your specific tent and strain, our team is available by chat or email.
Frequently Asked Questions
What tent size does a 400W to 600W LED cover?
Most 400 to 500W fixtures are rated for a 4x4 canopy at recommended bloom PPFD. A 550 to 600W fixture can comfortably cover a 4x4 at higher intensity or a 5x5 at moderate intensity. Always check the manufacturer's coverage map at your target PPFD rather than relying on wattage alone.
Can I run a 500W LED on a 15A household circuit in Canada?
Yes. A 500W fixture draws roughly 4.2 amps at 120V, leaving ample headroom on a 15A circuit for fans, a controller, and other accessories. For multiple lights or fixtures above 600W, a dedicated 20A circuit is a cleaner option.
How much does it cost to run a 500W LED per month in Canada?
At an average Canadian electricity rate of roughly $0.14 per kWh and an 18-hour veg or 12-hour flower photoperiod, a 500W fixture costs between $18 and $27 per month depending on your province's rate and schedule. High-efficiency models reduce that figure further by producing the same PPFD at lower wattage.
What is the difference between bar lights and quantum boards in this range?
Bar lights spread diodes across multiple arms for more uniform light distribution across the canopy and better penetration into plant rows. Quantum boards concentrate diodes on a single panel, which delivers a higher peak PPFD directly below the fixture. Bar lights tend to perform better over larger, flatter canopies, while compact quantum boards suit smaller tents with taller plants.
Do 400W to 600W LED lights require special electrical in Canada?
No special wiring is needed for a single fixture in this range at 120V. If you plan to run two or more simultaneously, or if you prefer 240V for efficiency, a licensed electrician can install a dedicated circuit. Some bar lights in this range are dual-voltage and can be plugged into either 120V or 240V outlets.
Which brands offer the best 400W to 600W LED options for Canadian growers?
Mars Hydro, Spider Farmer, AC Infinity, Photontek, and NextLight all have strong offerings at this wattage. Each brand emphasizes slightly different features, from smart controls to maximizing raw efficiency, so the best choice depends on your grow setup and preferences.
Do these fixtures ship free to Canada?
Yes. All fixtures in this range ship free to Canadian addresses through Trimleaf Canada.
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