General light questions.

Start at 24" with that type of light. As long as the light isn't too strong, pick height to fit light footprint to canopy. While a lux meter doesn't tell you how much photosynthetic light is emitted, it is proportional. you can use it to make position and choose a height based on readings in corners and edges etc... much cheaper item than a par metere. or ppfd meter? umol/s? haha you get the idea. Signs in bloom it is too close: trichomes develop below top of canopy, but not as thick on top (evaporating due to heat or too much light); Any leaves turning pale - starts interveinal and quickly spreads. happens at top, obviously. in vege, too much light will cause new nodes to stack nearly on top of each other. The leaves will get pale too. hours of use depends on strength of light. I am not familiar with this light. Even 16/8 can be effective for many contexts. I'd suggest 18/6, unless you think it's a very weak light. in the time i have to grow a plant, 16/8 works well for me, so i save 1/9th the cost for that portion. Bloom cycle is when you care about maximizing all you can. Vege is great if it grows with acceptable internodal distances and grows fast enough for your needs. If you see the plant always drooping the last 2 hours of lights being on, it's likely had it's fill for the day and it's not doing a lot with the photons pelting it at that point. There's something called DLI. There's a limit as to how much light your plant can use in 24 hours, and it can more easily be reached while running lights longer than the 12 hours in bloom - which is the main reason your bloom lights need to be ~50% stronger because they have 33% less time (18->12). Giving it more than it can take will only hurt your plant. light and dark processes occur all the time in the plant, but giving it some dark is still beneficial. There's an optimum amount of light you want to provde to your plants. Watts can help you compare prodcuts sold by the same company, but doesn't correlate to much otherwise. Without knowing efficiency of the light, you have no idea how many of those watts are merely generating heat instead of light. Plus that 1000w value is an 'equivalent-to' value, not likely the actual draw from the wall, and not equivalent to 1000w anyway. That doesn't mean it's bad. I have a light that says it's 1800w but is only 270-280w. It is a common practice with many brands. fwiw, i'm replacing that 270 with a light that runs at 240W and probably provides 25%-33% more light than the 270w fixture and with fewer watts. It lasts 3x longer but costs 3x more, and provides more light over that time at a lower incremental cost.

I normally run my autos at same time I'm vegging my regs. Find giving them a longer sleep produces bigger buds. Your running a LED can be inches away as won't get that hot. Not like a hps. Your plants will tell you how far keep raising the light a inch every couple hrs until they start producing bigger leafs and stretching up.

You can run veg + flower all together. The height of the light depends on the manufacturer as not all the light are the same even with the same wattage; take a look at the manufacturer website. 20/4 is not the best schedule , prefer the 18/6 because 20h of light will lead to a cal mag overdrive except if you bring extra cal mag.

in my humble opinion , now there are to much wats of power, she don't need is baby. distance dependes of cane of ligth that you use, Led, Cfl, Hps ?

you want to only run them on veg until you see buds forming, then blast them with both on. as far as height I would say keep them at least 28 inches in veg and after the first week of flower lower the light to about 22 inches from the tops run that until you are in the 5th week of flower then lower down to 20 inches. yes 20 hours light is more than enough

I would have the light as high as possible until the 3rd or 4th week.up to you but blue light is best for seedlings and red is best for flower. 20 on is OK, I've always done 18/6 though.

I have my LEDs set at 20 inches from the tops. I was originally running 20/4 lighting, but the plants seem to respond better to 18/6. I run both veg and flower switched on. I am only on my second grow, the only thing I am basing this information on is how my first plants reacted. Good Luck!!

Hey, So LEDs are a little hard to call....since there's so much variation between makers. If the manufacturer has a recommendation go off that first. If not, with a higher power like a 1000 watt you'll want to aim on the higher side, maybe 24-30 inches. But watch your plants closely because if they stretch a bit you'll know its safe to lower the light...and that beats trying to fix light burn or stress from too close. For the veg/flower you can run both, but running just veg is alright too because it should have a higher blue spectrum which benefits veg, just as the flower spectrum will have more red. Maybe check if running both consumes more power...if so it might be nice to save a little money. I like a 20/4 or 18/6 for my plants because i always believe that all living things enjoy some amount of rest, so i never do a 24 hr schedule. Happy growing. ✌️