27W led corn light bulb 1. Dual heat dissipation design of the lamp body. lsolated aluminum heat sink and dricer, hollow heat sink incerease airfilow." 2. Combined heat sink reserve gaps for more ventilation area. 3. Suitable to totally enclosed fixture. 4. Good brightness LED with 120lm/w,135lm/w,150lm/w 5. More 15% LED compared with general corn bulb in market. 6. Fanless design with 5 years warranty.