Feature: Similar appearance to traditional bulbs, special head dissipation design and unique light distribution method. Wide working voltage ,no flash ,no delay when power on or power off . Less light attenuation, less than 5% luminous flux decrease in the first 5000 hours. Luminous flux can be 60lm/W or above ,equal to 25W incandescent bulbs ,saving 80% energy compared with incandescent bulbs. Longer life span to 30,000 hours above, more than 10 times of incandescent bulbs, saving maintenance cost. Technical data: Material: glass Working voltage:230V LED Qty:66PCS Power:3.3W Color: white, warm white, red, green ,blue ,yellow Luminous flux:300lm(white),250lm warm white Lamp base : E27 Ra: ¨R70% View angle:120¡ã Working temperature:-20¡ã-45¡ã Working humidity:£¼90% storage temperature:-40¡ã-80¡ã storage humidity:£¼95% bulb house temperature increase::£¼27 internal part temperature increase : £¼37 IP rate: IP20 Life span :£¾40000H