... better heat dissipation 4.Endcap R17D TOPPO 15W 120cm T8 led bulb ETL TUV 1450lm clear cover Advantages: 1. R17D end ... . TUV, ETL, CE, ROHS,FCC certifications7.3 years warranty.Available led tubesLength: 2ft,3st,5ft,6ft,8ftWattage: 8w,10w,11w,15w ... or skype:TOPPO-Yuki.For more detaisl pls link to www.toppolighting,com We are glad to be of your service ...