Fluval T5 HO Sea Actinic Bulbs 39W 54W Marine Reef Lighting Aquarium Fish Tank

Fluval Sea T5 HO Actinic Aquarium Bulb replicates the essential actinic blue wavelength that corals and other photosynthetic invertebrates require. The strong blue light is also effective at enhancing fish colors, accentuating blue and violet tones.

eBay