Q. A plant engineer wishes to know which of two types of light bulbs should be used to light a warehouse. The bulbs currently cost $45.90 per bulb also last an expected 14,600 hrs before burning out. The new bulb (at a price of $60 per bulb) provides the same amount of light also consumes the same amount of energy but lasts on average twice as long.1
The labour cost to change a bulb is $16. The lights are on 19 hrs a day, 365 days a yr. If the firm's MARR is 15percent, illustrate what is the maximum price per bulb the engineer should be willing to pay to switch to the new bulb?