Lighting

How many watts of LED do I need per square metre?

GrowDealz team · Updated

Short answer

For flowering, plan on roughly 250-400 W of real power draw per m². Check what the lamp actually pulls from the wall, not the 'equivalent' HPS number on the box.

The spread is wide because efficiency varies. A lamp that makes 2.8 µmol per joule needs fewer watts for the same light than one at 2.0. Veg needs less light than flower, so a dimmable lamp lets you start low and turn it up. Do the sum on floor area, not tent size, and check the lamp's PPFD map to be sure the edges get enough.

Some starting points: the LEDMAXECO 300 W fits an 80x80 to 90x90 cm flowering area, and the Platinum Super King 720 W suits a 150x150 cm tent. More in LED grow lights.

Goes with this

Garden HighPro LEDMAXECO 300W – LED Grow PanelGarden HighPro LEDMAXECO 300W – LED Grow Panel, detail
Garden Highpro Garden HighPro LEDMAXECO 300W – LED Grow Panel
€280,00
Platinum Super King 720W LED Grow Light (3.2 µmol/J)Platinum Super King 720W LED Grow Light (3.2 µmol/J) – detail
Platinum Platinum Super King 720W LED Grow Light (3.2 µmol/J)
€224,40

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