Height and Dimmer Settings for Bloom Plus 400 Watt Grow Light

400W for veg is overkill, but you have dimmer. I used many LEDs, promote one brand, got 5 lights for free already to teelst out. That system always works, ill paste my thoughts to one guy, too tired to rewrite Germination and first week : 5000 lux and 30 cm 1-2 week of veg : 10k and 40cm 3 week veg : 15k 40 cm 4-5 weeks of veg 20k 40cm Flower 1 week . 30k 40 cm Flower week 2. 40k and 40 cm Week 3 flower 50 k 40 cm Week 4 flower 60 k 40 cm Week 5 - max light output, 40 cm Week 6 : max output 35 cm Week 7 max output, 30 cm Week 8 and till end : max light output and 30 cm distance to top level of canopy But here i had in mind, that plants grow normally, not sick or something else, thats good condition guidance for you If you veg longer, use last weeks numbers till you switch to bloom. Doggo apps, lux light meter pro, i use that one, its free for android phones K is letter to mark 1000.

1028 micro mol/ square meter/ second PPFD’s 100cm at 25% in Veg to avoid any photoinhibition.