When you see bud-set, that is the time to switch to HPS. Normally with a non-auto plant, you switch to HPS at some point bewteen week 0 and 3 of flower, depending on whether you are trying to control stretch.
stinkyattic Reviewed by stinkyattic on . Autoflower lighting? im at about week 4 with my ak47 x lowrider #2 and its about 4 inches tall...im currently using a MH bulb with a 20/4 light cycle...should I switch to my HPS or leave it MH all the way through? Rating: 5