Led high.

As for ur light if its a 600w. 100% is far to much. 35k max lux is all tats needed. So use a phototone app use it from 30cm away at 100% this will give you the heighest value & from there you'll know how powerful r have a kinda guess that'll allow u to make up ur height. But 100% at 60cm is far too high.

Huh. Different spectrums have dif luxs. All you need is a full spectrum veg/bloom. Leds today are all in 1. Anything with 630-660nm reds and 3500-5000 blues/warms these are the norms. You can get old spectrum like mars & spider farmer use to use IR/UV in their spectrums but found a much better one. And as of mid 2022 most if not nearly all led makers are following this suit. In ambient conditions all u need is 800-1000ppfd tats 40-55k lux depending on ur light. Specialty leds out there u can control like medic grow u either use Veg r Bloom. Hmmm. Again..a good light maker nowadays with a full rounded spectrum will allow you to run vegging plants as well as fems tat are in flower r what if you have autos and 1 flips a wk earlier. Tis why I like an all rounded spec like for this reason.. tat and I my tent does be rocking 18/6 24/7 with fems and autos at all varies stages. Yes/ its key for me to have a lux meter. But for reg grows that are all r near the same stages a photone app will di..

The proper LUX or Light requirement for our plants are as follows. If you don't have a LUX meter you need to get one. It's probably the most used/useful growing tool I have. Seedlings, 10-15k LUX Veg, 20-30k LUX Flower, 35-45k LUX Do NOT go over 50k LUX you will bleach your flowers. -damianfox