Is that a polycarb lid? I was thinking of trying that on my new tank since it's a 27 gallon and a weird shape. I need a 18x20 lid for it.I'm using Current USA's Orbit R24 light on my 24 gallon cube. My corals look beautiful and they seem to be thriving so I'm happy! Haven't measured PAR yet but from my understanding, it can produce the advertised 100 par at 20" depth. I don't think anything I have is too PAR-heavy and I plan to keep it that way.