Just wondering if the HPS or MH needs to be a certain distance away from the plant or is it all a matter of heat? If I move the light closer to the plant but control the temp on the plant will it make a difference?

Thanks in advance.
amdp Reviewed by amdp on . Light Distance. Does a HPS or MH need to be a certain distance? Just wondering if the HPS or MH needs to be a certain distance away from the plant or is it all a matter of heat? If I move the light closer to the plant but control the temp on the plant will it make a difference? Thanks in advance. Rating: 5