So I've been looking at possibly making it so my tank has more par then my two xr15 blues can provide and I want to do a hybrid fixture to get into some SPS but mainly a mixed reef with higher up being all sps and bottom being LPS. When it comes to the bulbs what are the differences and what would do best as like a mixture with my xr15 G6 blues. I like a little bluer to have the fluorescence of the corals but I also don't like super dark blues. Never had a t5 fixture before and still don't but want to know incase I do go with a hybrid setup to accomplish this lighting.