Ltpgtthe frosted corepro ledluster is designed for retrofit replacement of incandescent lamps it is compatible with fixtures with an e27 or e14 holderledlamps deliver huge energy savings and minimize maintenance costltpgtltulgtltligt4w 2700k very warm white lamp with 15000 hour average lifeltligtltligtline frequency 50 60 hzltligtltligtluminous efficacy lamp 65 lmwltligtltligtweight 0040 kgltligtltligtdimensions length 88mm x diamete