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Spend $300 now and SAVE $45 each year... ROI = 15%
Bring light into upper level rooms that do not have windows or skylight access. The interior of the 'tube' magnifies the light so that the fixture in the ceiling looks like there is actually a bulb inside. New employees may actually look for a light switch to turn it off when they leave a bathroom or supply room. The ROI Calculation is based on 14" diameter. Flexible or rigid tubing allows the unit to go around virtually any attic obstructions unlike other lighting systems, which saves you money.
The ROI Calculation is also based on factoring in the savings offset of purchasing, installing, and powering two light fixtures and their bulbs over ten years. If you are considering moving offices, adding on to your current office, or building a new office remember that you can reduce your lighting electricity cost by 50% to 80% with natural lighting. So, go for a few sun tubes on the top floor.
To put it in perspective, the average US cost of energy per employee is $568 of which $119 (21%) typically goes toward lighting. For an office of ten employees, the annual lighting cost is $1,200. So, adding windows, skylights and sun tubes or picking a building that has plenty of natural light may help save you money and make an all around more enjoyable work experience. Certain interior areas like office supply rooms and bathrooms are typically away from outside walls and they do not have windows. These spaces are well suited for Skylights as well as Sun Tubes, also called Sun Tunnels because the lights are often left on in these rooms when they are not occupied. These support area rooms are also the most ideal for Occupancy Sensor Switches.