The aqualine T5 HO (High Output) Reef Blue 39W is intended for use in saltwater aquariums with the bulb emitting, almost exclusively, blue light in the spectrum between 400 nm and 500 nm, peaking at 420 nm. These wavelengths enhance the growth of many coral species. In addition, when combined with Reef White 10K or 15K they give the aquarium a most natural appearance.
For easy ordering and savings on shipping, these bulbs come in packs of ten (*Not Required). Price is per bulb.