Energy Miser FE-IISB-23W-65K - 23 Watt CFL Light Bulb - Compact Fluorescent - T2 - 100 W Equal - 6500K Full Spectrum Daylight - 80 CRI - 70 Lumens per Watt 100 Watt Equivalent, 23 Watt, 120 Volt, 6,500k Industrial CFL Bulb Brand: Longstar Shape: Spiral Base: Medium (E26): Bulb Life 10,000+ hours Color Temperature: 6500K Lumen: 1,600 (100% usable to your plants)