Vacuum or injection with inactive gas, G45(P45),A55(A15),A60(A19) is alternative with frostedbulbshell. To guarantee bulbs can pass Whirlpool Thermal circle test in 300°C high temperature circumstance, we use imported glue, high-temperature resistant tin welding and other high-temperature resistant materials and designs. Alternative types: T22(T7), T23(PGMY), T25, T29, G45 E14, E26.Specifications ...