Group relamping is the systematic replacement of the lamps in a lighting installation before, not after, they burn out. This is possible with fluorescent lamps because of their uniform, long life in service. It is scientifically practical to predict when most of the lamps will burn out, and to replace the lamps shortly before that time is reached.

Group relamping substitutes modern mass production methods with low cost-per-lamp charges for the old, expensive haphazard spot relamping system. The savings in labor will more than compensate for the shorter time the lamps are left in service.

A group relamping program will result in:

Reduced maintenance costs
Better lighting
Fewer work interruptions
Greater productivity

Many installations are group relamped after operating for several years. The time schedule will vary for each installation.