Hi Sate,

I can not answer your question.. but my advice is to work on methods of getting your light as close as possible to your plants without burning them. I suggest investment in cool tubes or similiar cooling hoods..

Every 12 inches further from the foliage that your light is placed, it looses 1/2 of its LUMENS... HID lights should never (few exceptions) be more than 12 inches from the plants...

iloveyou