The high-intensity output of a Zilla Mini Halogen Bulb is more energy efficient than standard incandescent bulbs. Available in three colors, each bulb pin-points light and heat using less power. This provides healthy light and essential warmth in the reptile habitat. Up to 250% more efficient than incandescent|Thicker glass and stronger filament bulbs yield over 2,000 hours on average, double the life of incandescent|Provides healthy light and essential warmth for your reptile|Fits with Zilla fixtures: Halogen Mini Dome, Pro Sol Fixtures, Low Profile Fixtures and more!