GL G-10767 - F54T5/850/HO/ECO Straight 54-Watt 45.80" Inch T5 Linear Fluorescent Lamp Mini Bi Pin Base, 5000K, G5 Mini Bipin, 45.80" long, Good Efficiency 75% less energy than incandescent, 5200 Lumens More than 100++ lumens/watt (efficacy) Bulb Meets Federal Minimum efficiency Standards Works with INSTANT / RAPID Strat Fixtures, Long Life: &gt;25,000 hour ,Bulbs sleeved safe wile shipping CRI 85 800 series high quality triphosphor coding Energy efficient, high energy savings in an environmentally responsible lamp low mercury meets TCLP Brand Cross Reference F54T5/850/HO/ECO - F54T5/850/HO/ECO - F54T5/850/HO/ALTO - FP54/850/HO/ECO