1) Press the button labeled: - DAY for the daylight source - CWF for the cool white fluorescent source - U30/TL84 for the Ultralume or TL84 source installed in your unit - A for the incandescent source - UV for the ultraviolet source.
2) Press OFF to turn one or more selected lamps off.
The ultraviolet source (UV) can be used in combination with any of the light sources or by itself for evaluation of optical brighteners, whitening agents, or fluorescent dyes.
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