Solray SR-6013 F39T5/850 39 Watt T5 5000K Fluorescent Tube Daylight Bulb 6 Pack Sold in a pack of 6 bulbs. 39 watt fluorescent light bulbs. Color Temperature: 5000K - daylight. T5 bulb with a 34 inch length 3 footer Has a double extra long life of 20,000 hours.