... With Long Worklife, Great Luminanting Angle, Super Bright LED(Cree),and Very Special Radiation Design Features and Technical ... toughened glassAbstract heat type: Whole lamp, LED working temperature < 45Light Source: power LED, Super bright white LED chipLED luminous efficacy: > 60 Lm/ ... constant current design built in, No need extra constant current driver, and the current can steady-going, That's the ...