... no warm-up or cold start problems7. Solve 4 difficulties for LED packaging, heat sinking, operational lifespan, luminous efficiency8. ... radiation diameter on the ground is accordwith the standards for size.9.Recommended Replaced Bulb:50W CFL Technical ... RoHS ApplicationsWidely used for decoration field such as super market, hotel, tavern,meeting-room, exhibition hall, show window, disco, karaoke ...