Difference between DE and Mogul based MH?

[Myka]

The easiest way to get the whitest lights possible without risking too much money when you don't know the bulbs you like is to just go for a 10K MH bulb (which will be higher PAR than say a 15K anyway), and choose T5s to pull the light the way you want it. You do realise though, that your corals will look much nicer if you have a slight blue hue by using T5s with blue or actinic color? I have found that a blue or blue plus (blue + actinic) with a Fiji Purple (kinda reddish so it pulls away from the blue hue) for T5s REALLY makes the corals' colors pop. Really nice combination.