... on PCB for better heat dissipation 4.Endcap:FA8 20W 4ft FA8 end cap T8 led lamp ETL TUV ... 2ft,3st,5ft,6ft,8ftWattage: 8w,10w,11w,15w,18w,20w,22w,30w,32w,35wDrivers: isolated internal drivers / non-dimmable ... external drivers/external dimmable drivers 20W 4ft FA8 end cap T8 led lamp ETL TUV high ... com We are glad to be of your service. 20W 4ft FA8 end cap T8 led lamp ETL TUV ...