GoodliteGoodlite -G-10716  FB32T8/841/ECO/6 T8 U- Bend 32 Watt 6" Inch Wide  Fluorescent Tube Light Bulb 4100k Cool White G13 Medium Bipin, 6'' Leg Spacing 22.5'' ,800 series high quality triphosphor coding Energy efficient, low mercury meets TCLP, CRI 85 3200 Lumens More than 80++ 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 Energy efficient, high energy savings in an environmentally responsible lamp Reference F32T8/SP41/U/6/ECO - FBO32/741/6/ECO - FB32T8/TL741/U/6/ALTO - FB32/SP841/6 -F32T8/SPX41/U/6/ECO - FBO32/841/6/ECO - FB32T8/TL841/U/6/ALTO