RELAMPING PRACTICES (HID)
Group relamping is the systematic replacement of the lamps in a lighting
they fail. Because of the long and generally uniform life of High Intensity
Discharge and Low Pressure Sodium lamps, it's possible to predict when most of
the lamps will reach the end of their rated life and to replace them before
that point is reached.
Group relamping substitutes low-cost mass production methods for the expensive
practice of spot relamping, (where lamps are replaced only when they fail).
The labor saving that accrues from group relamping compensates for the shorter
time the lamps are left in service.
A group relamping program will result in:
- Reduced maintenance costs
- Better lighting through maintained light output
- Fewer work interruptions
- Greater productivity and increased safety
When initiating a group relamping program consider the following:
- Devise the best time schedule. Determine the minimum acceptable lighting
level. Then determine the appropriate time interval for relamping. This'll
produce the best maintained quality of light at the minimum system operating cost.
The Illuminating Engineering Society Lighting Handbook and manufacturers'
literature have helpful information on maintenance and on determining the cost of
- Schedule group relamping to coincide with luminaire cleaning to assure maximum
light output from the relamped installation.
- Order sufficient lamps to have an adequate supply available when group
relamping is scheduled. Also, order a quantity of spare lamps to use for isolated
lamp failures that occur prior to the next group relamping.