Just returning to reefing after a long break. Back in 2007 I was using 250 MH fixtures and t-5 actinic supplements. The electric bill was killing me. My new tank in 540 gallon 36" deep. I would like to use 2 large solatubes for natural sunlight and led's for color pop and shimmer. i remember a couple of tanks back in the day using solatubes, just wondering, has anyone had long term success with natural sunlight?