My 2c I have found my perfect 250 DE Radium replacement .... FINALLY after many, many, many attempts of diff products , its 99% the exact growth , colors, health does not color morph or polyp scoop my micro-lordes , acans , ect , while also gaining the ease of modern control its 90w and no bulb changes for 15k, 20,23 hits a 2'x2' like a champ , and the shimmer ...... Radium (original formula 400w) would approve of. Seeing the white ripples in full 15k daylight , none of the leds till these even come close , I am about 2 months into totally changing over my whole system and would never look back ... plus the ease of program-ability and a moonlight you cant come close with MH any more imho , these just came out though like very recently and people are too vested into what they have so , do what works , just sharing my recent endevours . Keep it fragtastic peeps !