Lux meter is the measuring device to measure the lux level
of lighting fixture. in industrial sector two types of
lighting fixture is being used as street lighting purpose
1. HPSV (Sodium) and 2. HPMV (Mercury).
HPMV having white light which is an combination of red,
blue and yellow colour, while HPSV haivng Yellow lighting.
in HPSV red & blue colour will be absent.
during measurement of the lux level of HPSV and HPMV
1. Lux meter can measure the actual lux level of both
2. or it will show false reading for HPSV fixture light as
it has only yellow light present.
please give me answer