Best Lighting possible for me

I've recently purchased a pantry flourscent light at Home Depot. I upgraded the light to a Aqua -Glo 18,000K T-5 light. (12 inches) I was wondering if anybody knew a better light for a 12" light bulb.
 
I use a 12" fixture also for my refuge with a daylight bulb 7500k.What are you using the light for, what color are you trying for (bluer), and what corals do you want to keep?
 
i really would like something bluer right now my light is like a purple blue. I would like to keep mushrooms maybe so polyps, nothing to big. I just would like a little bit more Kelvin.
 
You may have to really look around to find a bulb, mine is an eclipse bulb 5,500k (not a 7500k)from petsmart I know they carry a few others but I'm not sure of the kelvin. I believe most were daylight bulbs.
 
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