Many elevators in service today use either MR16, GBF or 1383 halogen light bulbs. The light bulbs in the elevator cabs are typically operating 24/7, so they are an ideal retrofit candidate. We were delighted to see how well the new
2W LED GBF elevator bulbs from TCP worked, to replace
20W halogen GBF light bulbs.
Here is the math supporting the economic viability of the retrofit:
Halogen VS LED energy savings per bulb is 18W. 18W multiplied by 8,760 hours per year = 157,680 Watt-Hours. Divide by 1,000 to get 157.7 kWh. In NYC, average energy rates are about $0.18 per kWh, so the annual energy cost savings of each light bulb is $28.39. Considering the LED GBF light bulbs cost $30.00, we can be assured of a one year simple payback. If we add in maintenance and materials cost savings, the math gets even better. Each halogen GBF costs about $10 and has an average rated life of 2,000 hours. The LED GBF has a three year manufacturer's warranty, which equates to 26,280 hours of warrantied service life. Over this period, materials costs for replacement halogen GBF light bulbs would run over $130, (thirteen GBF bulbs x $10 per light bulb). So the total economic benefit of the three year warrantied life of the LED is over $185, or over $61 per light bulb per year.
The elevator cab pictured below has six light bulbs, so the owner of this property has just increased his net cash flow by $366 annually. Assuming the property is valued at a modest 10 percent capitalization rate, the value of the property increased by $3,660 per elevator cab.
Of course, none of this matters if the elevator's lighting is no longer acceptable. Happily, that is not the case. The lighting looks great, and a major heat source uncomfortably close to the heads of elevator users has been permanently removed.
Here are the before and after photos:
Posted By Max Hoover at 10:54 AM
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