Hi Tony,
I'm using LumenMax elite reflectors. They are pretty big, with three over my 60 inch tank there isn't a lot of room left. You're right 14k to 20k isn't a big jump, I was just looking for a little bit more blue to help show coral color . I have some fiji purples along the back of the tank but they don't make much diference once the MH's are fired up.
__________________
|