5
Visible Light
This can be displayed either in Lux or Foot-candles. To change the units press
Set\Units\Lux-Footcandl.
A visible light readout is provided to control illumination and limit damage done by
visible light. Normal museum light levels should be limited to 150-250 Lux.
Once measurements have been made the light level can be altered if necessary and UV
filters can be fitted on windows, fluorescent tubes or other UV producing light sources
as required. These filters often deteriorate over a period of years so it is essential to re-
check them periodically.
Magazine reprints on the subject of museum lighting , UV etc can be obtained from
the manufacturer.
Suggested light levels for various other purposes are given below:
Corridor, stairs etc 100/150 Lux
Warehouses, storage bays 100/150 Lux
General office work 300/500 Lux
Rough bench/machine work 300/500 Lux
Medium bench/machine work 500/700 Lux
Drawing offices 750/1000 lux
Fine bench work 1000/1500 Lux
Fine inspection 1500/3000 Lux
Minute work 3000/5000 Lux
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