50 to 749 Equivalent Range, Warm (1,000 to 3,000°K) Color Temp, 2 Pin, 1-7/8 Inch Overall Length, Halogen bulbs produce more bright light (Lumens) for less watts when compared to standard incandescent bulbs. Halogen bulbs also produce the most heat. They are an economical solution that provides a bright, white light with excellent beam qualities for accent or ambient lighting.