Will the bulb be used from outside the viv? Blue is fine for night viewing but usually red will show more light inside the viv.
I'm not a fan of light bulbs inside the viv with WTFs since they will find any way they can to perch on it and if set on a timer will burn the frogs.

Wattage seems high but how much heat it will add depends on how far above the viv it is and what it will be shining through.