About this itemCap-Base G13 [ Medium Bi-Pin Fluorescent]Life To 10% Failures (Nom) 12000 hLife to 50% Failures (Nom) 15000 hLife to 50% Failures Preheat (Nom) 20000 hLSF 2000 h Rated 99 %LSF 4000 h Rated 99 %LSF 6000 h Rated 99 %LSF 8000 h Rated 99 %LSF 12000 h Rated 89 %LSF 16000 h Rated 33 %..