Other LET 100w T12 8Ft wear marks.
Back in April 2015 I picked up some NOS Light Emission Technologies 100w T12 8Ft lamps from a local firm who had changed their lighting scheme and were selling off their stock of obsolete lamps.
These do get quite frequent switching but also they get turned on and forgotten about and run for a few days before somebody notices and turns them off. 
One recently failed and the other lamp in the twin fitting hasn't got much of a sock around the electrodes but there is clearly some blue glow going on.
Spent it's whole life on an LEL Multipulse starter which gives a nice preheat before striking.

Other LET 100w T12 8Ft wear marks.

Back in April 2015 I picked up some NOS Light Emission Technologies 100w T12 8Ft lamps from a local firm who had changed their lighting scheme and were selling off their stock of obsolete lamps.
These do get quite frequent switching but also they get turned on and forgotten about and run for a few days before somebody notices and turns them off.
One recently failed and the other lamp in the twin fitting hasn't got much of a sock around the electrodes but there is clearly some blue glow going on.
Spent it's whole life on an LEL Multipulse starter which gives a nice preheat before striking.

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