1. It is a double tube antique led bulb, inside tube is diameter 32mm, it is thick white frosted glass, we can’t see the filament inside, and the light is much even when it is lighting on. The outside glass is diameter 50mm, amber glass. Why we make it gold amber glass? Because the gold amber glass will make the light output more soft and warmer, then we can clearly see there is two tubes, it is nice looking.