OttLite B84J36 Plug In Swirl Compact Light Bulb 13 Watt Replacement Type K High Definition Natural Lighting Self-Ballasted Bulb Low heat, low glare illumination helps reduce eyestrain For use as a replacement bulb with OttLite lamps that require model T135Z5 bulbs Energy efficient bulb rated to last up to 10,000 hours Equivalent of Ott "Designer Series" 13 watt bulb; fits Captiva lamp SPECIALTY BULB - PLEASE SEE BASE PICTURE