... led corn light 2. E27/E14/B22 3. 720 degree light beam 4. Epistar/ Chimei led chip ... 5. CE and RoHs 1. Beam Angle: 360 degree 2 ... more energy saving compared with conventional street light, CBL, Incandescent light. 4. Estimated lifespan: >50, ... problems 7. Solve 4 difficulties for LED packaging, heat sinking, operational lifespan, ...