A supermarket of dimensions 20m × 15m and 4m high has a white ceiling and mainly dark walls. The working plane is 1m abo
Posted: Sat May 21, 2022 10:17 am
A supermarket of dimensions 20m × 15m and 4m high has a white
ceiling and mainly dark walls. The working plane is 1m above floor
level. Bare fluorescent tube light fittings with two 58 W, 1500mm
lamps are to be used, of 5100 lighting design lumens, to provide
400 lx. Their normal spacing-to-height ratio is 1.75 and total
power consumption is 140 W. Calculate the number of luminaires
needed, the electrical loading per square metre of floor area and
the circuit current. Generate and draw the layout of the
luminaires. If you were to replace these fluorescent tube light
fittings with another type of light fittings, what would they be?
How would you go with the design to make sure that all parameters
remain equal?
ceiling and mainly dark walls. The working plane is 1m above floor
level. Bare fluorescent tube light fittings with two 58 W, 1500mm
lamps are to be used, of 5100 lighting design lumens, to provide
400 lx. Their normal spacing-to-height ratio is 1.75 and total
power consumption is 140 W. Calculate the number of luminaires
needed, the electrical loading per square metre of floor area and
the circuit current. Generate and draw the layout of the
luminaires. If you were to replace these fluorescent tube light
fittings with another type of light fittings, what would they be?
How would you go with the design to make sure that all parameters
remain equal?