LED light height

I have two aglex 600w cob led’s and I’m wondering the light height from the canopy.( I know they’re not the best but the price was right) some of the videos I’ve watched people have them anywhere from 8-12” but instructions say 18. Currently growing in a 3x3x6 tent. Thanks

Maybe start 24" - and lower gradually if no bleaching or other problems..

Consider a digital temp gun to monitor leaf surface temps.

I’m currently 3 weeks into flowering 24” still the proper height??

18-24" you will be fine