Modern full-spectrum LEDs have largely replaced older HID lamps for home growing — they run cooler, sip less power and last for years. The trick is matching coverage and intensity to your footprint, not chasing inflated wattage claims.
Ignore the marketing "equivalent" watts and look at actual power draw and the rated coverage area. For seedlings and greens, a T5 or a small quantum board is plenty. For flowering and full-cycle growing, a quality LED board with Samsung-class diodes earns its keep.
A quick map of the options before you spend.
| Light type | Best for | Footprint | Price tier |
|---|---|---|---|
| T5 / fluorescent tube | Seedlings, greens, propagation | Shelf / 2×2 | $ |
| Quantum board LED | Full cycle, small–mid tents | 2×2 – 4×4 | $$ |
| Bar-style LED | Even coverage, large tents | 4×4 – 5×5+ | $$$ |
| CFL bulb | Cheapest, single small plant | < 2×2 | $ |
Established product lines we'd point a friend to. Specs are typical figures — always confirm the current listing.
Inexpensive, low-heat strips that sit just above seed trays — ideal for starting seedlings and growing leafy greens. Barrina and Hydrofarm Agrobrite are popular shelf-light choices.
The workhorse of home growing: a dimmable board of Samsung-class diodes covering roughly a 2×2 ft flowering footprint. Spider Farmer SF-1000 and Mars Hydro TS 1000 are the go-to picks.
Multiple light bars spread output evenly across a larger canopy with no hot center. AC Infinity IONFRAME and Mars Hydro FC-series fill a 4×4 well.
An affordable all-in-one panel for a first grow. Output and efficiency trail the premium boards, but it's a fine, low-cost way to learn. VIVOSUN VS-series is a common entry point.
A practical guideline for LED is roughly 25–35 watts of actual draw per square foot of canopy for flowering, and far less for seedlings and greens. So a 2×2 ft (4 sq ft) space wants around 100–150 W, and a 4×4 ft (16 sq ft) wants roughly 400–500 W. Always use real wattage, not the inflated 'HID equivalent' number.
Both are full-spectrum LEDs. A quantum board concentrates diodes on one panel — simple and great up to about a 4×4. Bar-style fixtures spread diodes across several bars, giving more even coverage and better penetration over larger canopies, at a higher price. For most home tents a single quality board is plenty.
No — seedlings are easy to please. An inexpensive T5 LED strip a few inches above the tray prevents the leggy, stretched growth you get on a windowsill. You only need higher-powered LEDs once plants are larger and you're growing through to harvest indoors.
For learning, yes. A budget panel will grow plants. The premium boards justify their cost with better efficiency (more light per watt), more reliable diodes, real dimming and longer life. If you plan to grow regularly, a mid-tier board from a known brand is the better long-run value.