I have used PC, VHO, MH, LED and T5.

My favorite is a combo of MH, LED and T5. MH for shimmer and main lighting...oh and my favorite part is when the ballast kicks on and the bulbs slowing come up instead of popping on and shocking everything. I like T5 for actinic...great blues and they are small unlike VHO and PC and then LED for moonlight. That's my favorite combo.

I have never used LED for main lighting so I have no experience there.

I have used both T5 and MH as main lighting for several years and I prefer the MH for the shimmer and the bulbs last longer. I found that using T5 I had to switch bulbs out every 6 months when putting them over SPS because they lose intensity much quicker than MH.

Like Ace mentioned...one of the best tanks I have ever seen with HUGE SPS colonies and beautiful color was Bernie's old tank....all lit by T5.

I still prefer MH...personal preference. There are cons and pros for both T5 and MH....but both can give you the same end product.