... warm-up or cold start problems7. Solve 4 difficulties for LED packaging, heat sinking, operational lifespan, luminous efficiency8 ... diameter on the ground is accordwith the standards for size.9.Recommended Replaced Bulb:50W CFL Technical ... LEDsLife50 000hrsBaseE27/E26/B22DimensionDia62mm *L190mmCertificatesCE&RoHS ApplicationsWidely used for decoration field such as super market, hotel, tavern ...