) From your textbook see Figure 17.6 and lighting layout (c) for an office. This office measures 24.5 feet by 24.5 feet in plan view. Each of the lighting fixtures (luminaires) shown in lighting layout (c) from Figure 17.6 has a single 102-watt lamp. Each of the luminaires is cleaned once per year by the facilities maintenance staff. It takes an average of 5 minutes per fixture (for a single maintenance staffer) and maintenance time (labor wages plus benefits) is estimated to cost $30 per hour. The cost for cleaning supplies and consumables (cleaning clothes, etc.) is minimal and makes up a small percentage of the overhead factor included in the $30/hour rate. Luminaire re-lamping is scheduled every six years (at 75% of rated lamp life) at a cost of $10.00 per lamp for the lamp itself and a time budget of 10 minutes per luminaire at the standard $30 per hour rate.

What is the annual combined total cost for cleaning and re-lamping?

What is the annual combined cost on a cost/square foot basis?

(p) (g) FLEEE DOLL J. -L -L el (c). FIGURE 17.6 Exercise in evaluating lighting expressions in terms of form, pattern, orientation, and locations. (a) f) ! ELEE - -L -L ELLE - -- - - - L-1- 1- - ------ -- -- -- - -(q) _ _ (p) (g) FLEEE DOLL J. -L -L el (c). FIGURE 17.6 Exercise in evaluating lighting expressions in terms of form, pattern, orientation, and locations. (a) f) ! ELEE - -L -L ELLE - -- - - - L-1- 1- - ------ -- -- -- - -(q) _ _