Sylvania 20425 - F4T5/BLB Fluorescent Tube Black Light Fluorescent bulbs are energy saving bulbs and last up to 10 times longer than incandescent bulbs Fluorescent bulbs help you save money using 40 - 70% less energy than incandescent bulbs Fluorescent bulbs are 5-8 times more brighter (more output lumens /watt) than incandescent bulbs SYLVANIA T5 fluorescent bulb, 4W Base: Miniature Bi-Pin, Color Temp: , Rated Life (hours): 6000