Pack of 20. Title 20 compliant: U. Title 24: N. Color temperature: 3000K/Soft White Light. Contains mercury. Non dimmable. Wattage: 39. Base: BI-PIN. Average life: 24000 Hrs.. Lumens: 3100 Lms. CRI: 82. Bulb shape: T5. Length: 34 in.. Diameter: 0.625 in.. Bulbrite's Energy Wiser T5 high output Fluorescent bulbs utilize high performance tri-phosphor for maximum brightness and color rendering. The high light output coupled with energy efficiency and long life make Energy Wiser T5 bulbs the ideal solution for commercial, industrial, sign and display applications. Ideal for ceiling fixtures and commercial/industrial applications. High output and performance tri-phosphor used in T5 lamps for maximum brightness and color rendering.