Canopy footprint16 sq ft
Planning range480–640W
Best practiceUse PPFD + dimming
How to size a light for a 4×4 tent
A 4×4 tent covers 16 square feet. Most high-light LED setups land around 480–640W, with dimming used to match the crop, canopy height, and manufacturer PPFD recommendations.
Wattage is a planning shortcut, not a promise of coverage. Compare the manufacturer's PPFD map, fixture dimensions, dimming range, electrical requirements, and hanging height. A light that is right for one crop or stage can be too intense for another.
A current catalog match for this footprint
High-output 4×4 optionThis 680W multi-bar fixture is slightly above the common 4×4 planning range, so its dimming controls matter. Use the manufacturer PPFD guidance and reduce output when the canopy does not need full power.
- 680W rated input power
- 1,870 μmol/s stated PAR output
- 40–100% output settings
- 0–10V and onboard light-output control
View listing and live availability →Price, stock, checkout eligibility, and shipping are intentionally not frozen in this guide. Confirm those live details on the product listing before ordering.
What to check before you order
- Coverage and PPFD at the height you can actually hang the fixture.
- Input voltage, cord or driver requirements, and circuit capacity.
- Dimming or controller compatibility for seedlings, veg, and flower.
- Heat load, fixture dimensions, hanging hardware, warranty, and serviceability.
Need help matching a fixture to your crop or room? Call Toledo Indoor Garden at 419-725-2450.
Related tent-light guides
Frequently asked questions
How many watts do I need for a 4×4 tent?
For a 16-square-foot canopy, 480–640W of quality LED power is a common full-flower planning range. PPFD distribution and dimming are more useful than wattage by itself.
Is 680W too much for a 4×4 tent?
It can be more than a crop needs at full power, but a dimmable 680W fixture gives headroom. Follow the manufacturer PPFD map and start below full output while the canopy develops.
What should I check before ordering a 4×4 grow light?
Check the fixture dimensions, input voltage, cord requirements, hanging points, dimming method, warranty, and manufacturer coverage map. Confirm current price and checkout on the live product page.