$1\mathrm{.}3)$ A $20$mxx$40$m room is receiving an average luminance level of $200$ lux. If the

maintenance factor and utilization factor are $0\mathrm{.}9$ and $0\mathrm{.}8$ respectively.

a$.$ How many fixtures are required? If the available fixture houses $4$ fluorescent lamps with

each lamp giving of $2000$ lumens?

b$.$ Distribute the fixtures for uniform lightning?

c$.$ How many lumens will light the floor surface?

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