1. This is a large size tube cylinder led bulbs, the size is diameter 65mm, length is 330mm, it is really a large cylinder led lamp. Medium lamp base with skirt to reinforce connection between lamp base and glass cylinder globe. Two pieces of 450mm length led filament forms a Quadruple spiral filament design. It is about 6W rated, 200lm output at 2000K. CRI is Ra>95.