Cmh lighting distance

[Troopa z]

Wanted to use 3x 315cmh in a 3x6 space but height may be an issue as fan and filter taking up a lot.
How much height from canopy are the cmh lamps meant to be?

 

[Intimea]

Well...it depends on the results you're planning to achieve.

By considering your environmental values on range, you must know the output of your lamps, and do some maths...by varying the distance from the canopy, you're going to vary even PPFD.


Take a look at this thread

https://www.icmag.com/ic/showthread.php?t=319438

lots of info

 

[kelly1376]

Based off these tests you can definitely go 18 inches without problems:

https://www.icmag.com/ic/showthread.php?t=327419