Originally Posted by 967
I'm waiting on an email back from supplier about hanging vertical and if it's all cool I'll drop the $400. Figuring it should be all good but not actually sure about how the light fits into socket. Haven't looked into it yet, just looks like it bolts in sort of?
Genuine Philips 315's are U (universal) rated, meaning they can be operated in any position. PGZ lamp holders are a polarized twistlock configuration. Insert the 2 slightly different feet on the lamp into the 2 slightly different holes in the socket & turn 90 degrees clockwise until the pins bottom out in the keyholes. Secure & easy. Piece o' cake once you notice that the feet are different sizes.
PGZ & PGZX lampholders are slightly different. Double envelope open fixture rated 315's will fit both. Single envelope enclosed fixture rated 315's will only fit PGZ lamp holders.