Hi Wiz, I hear and read many-many opinions on forums regarding lights and it seems that every " experienced reefer" has the right plan on how lights must work to grow coral. The one thing I have learned from 5 years of designing leds lights for reef aquariums - is that there is not a single thing a light must have to grow coral - it is a symphony of many factors that not only grow coral but make your tank look good. Just like good water quality in your tank is not just one thing - but a result of many things - in proper balance. Exactly what UV nanometer led is he suggesting that would grow coral? I would be very interested in his answer to this. If he says you need a T5 in addition to our lights - then what he is saying is that white light that you get in a T5 led has UV - or is capable of producing it in conjunction with our leds? If that is the case - then the white leds in our lights contain the same spectrum as any bulb type of light - T5 or otherwise - and will grow coral just as well. I would ask him if he has ever used this light - or any of our lights - over coral and has firsthand experience in what they will - or wont grow. I would imagine he has not or he would know that the DM-165p+ and every one of our lights will grow coral amazingly well. And you might want to read the thousands of posts on the forums stating this - from people who have actually used them. Don't feel bad - just send me ( and your forum friend) pictures of your coral growth under this amazing light.
Rick