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I believe there are differences betweeen bulbs and fixtures.
You kinda need to see it on your plants how far they like it.
Put a temp meter at the level of your canopy. If the temp is okay, you shouldn’t have any problems.
The distance can vary from 40-60cm roughly.
This chart applies only if you are running single ended bulbs and air cooled equipment. (No heat factor included).
Bare bulb hoods running single ended bulbs I believe should be 18†from the canopy...but might want to check with someone else because I only run air cooled in my grow.
No prob. If you do a google image search “HPS chart†this will pop up. If you do “MH chart†you can find another that has the same for a MH single ended bulb in an air cooled hood.
Thanks broo a lot.i was using leds before.i put on hps after 2 weeks of flower.and then the fang leaves startet yellowing one buy one.i gues light burn just i never see one
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