Hi Zoid...

If you are going to use HID lighting, Air flow and ventilation are KEY..
If the light is more than 12 inches from your foliage.. you will be loosing so many lumens (and in MY opninion) that it is a FREAKING waste to be using HID lighting. You might as well swicth to FLUORESCENTS... of course there are exceptions to this rule.. BUT very very few!

The closer the LIGHT.. the BIGGER the buds.. the bigger the yield.. the more BLING..

lloveyou

If you can not get your light within 12 inches of your plants (because of heat issues), it is time to rework your airflow..

and NOW you KNOWM