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Look Before You L.E.E.P.!
Tell me more about identifying: T-12 Fluorescent Lamps
T-12 Fluorescent Lamps --> replace with T-8 Flourescent Lamps T-12 lamps are the standard fat tubes in most ceiling fixtures. They are 1 1/2" wide (about golf ball size in diameter). T-8 lamps are slimmer, at 1” (more like ping pong ball size in diameter). On one end of the lamp, you will find numbers printed on the glass that begin with “F” -- look for T12 or T8 in that string of numbers to determine which lamp you have. If you can't reach the lamps in the fixtures, look for extra lamps stored in a utility closet or contact your maintenance staff. Step 1. For this calculation, first identify the type of lamp in your fixtures. If you have T-12 lamps, continue to Step 2. If you have T-8 lamps, congratulations, you already have energy-efficient lighting. Step 2. Identify the type of fixtures you have -- generally, you will find 2-lamp fixtures and 4-lamp fixtures. If you have U-shaped fixtures, count each U-shaped tube as one lamp (usually 2-lamp fixtures). Step 3. Input the number of fixtures in your workplace of each type on the pledge form. E.g., you may have 10 fixtures with 4-lamps and 6 fixtures with 2 lamps. The calculator will use an average of a 40-watt lamp for the T-12 lamp. For the T-8 replacement, the calculator uses 3 tubes for every 4 T-12 tubes per fixture and a 32-watt lamp (T-8 lamps give off more light per watt so fewer lamps are needed).
Incandescent Bulbs --> replace with Compact Fluorescent Lamps (CFLs) These are the typical “light bulb” shaped bulbs. They are typically found in task lamps on desks, in standing floor torchieres, in recessed ceiling fixtures or in hanging fixtures. For this calculation, the calculator uses an average 75-watt bulb. The replacement is a 20-watt compact fluorescent lamp (CFL). CFLs come in a variety of sizes and styles to fit almost any fixture or design preference.
Incandescent Exit Signs --> replace with LED Exit Signs Since you may not be able to see the bulbs in most exit signs, one of the easiest ways to determine if they are incandescent is to put your hand on the sign to see how warm it is. A very hot sign will be incandescent. Both fluorescent and LED (light emitting diode) signs will be closer to room temperature, with LED signs being the coolest to the touch. An LED sign also may be identified by the tiny individual LED lights within the lettering, which might be visible. However, some LED signs have the same facing as other types of signs, with no visible LEDs. For this calculation, the calculator uses an average sign wattage of 30 watts. The replacement LED sign uses only 4 watts per sign.
For this field, estimate how long per day this type of office light is on and multiply by the number of days per week the office or facility is open. If you have similar lights in different areas that operate on different schedules, include your best guess of a representative or weighted average. Feedback All of the calculations generated through L.E.E.P. are rough estimates based on average lighting types and energy costs. Your actual savings will vary based the actual wattage of all lamps changed, the actual “on” time for each fixture, your utility costs, and the initial cost of making the changes. A payback period of just a few years is typical for most businesses.
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