The Solar SensorLight (by Alpan, Inc.) relies on the sun instead of electricity to charge the battery. You can use it to solve a lighting situation in a location where no electric power is available. These are often the very areas around the home, garage, or the tool shed that need security lighting. I wish I'd had a couple of these lights last year when an ice storm hit our area and we were without power for seven days.

The unit comes with a replaceable solar-powered battery designed to last from three to five years. The bulb is an energy-efficient 20-watt halogen that's easily replaced and has a two-year life expectancy. The built-in motion detector activates in response to heat and motion, automatically turning on and then shutting off when the area is clear. Even though the light is made of all-weather UV-stabilized black plastic case, it's still important to protect the main unit from the rain.

It's easy for a homeowner to install, but you might be able to sell and install some lights as part of a larger exterior project. The unit can be installed either horizontally (under the soffit or eaves) as a convenience light or vertically (on the wall surface) for security (Figure 12-27). When deciding where to mount the main unit, keep two factors in mind. First, the motion sensor has a "field of vision" about 40 feet in front of the light. Second, make sure that the solar module faces south. The solar module is the power source for the motion sensor, converting the sun's energy into electricity that charges the battery. This requires direct sunlight falling onto the face of the solar module for as long as possible over the course of the day.

Photo Courtesy of: Alpan, Inc.

Figure 12-27 Solar-powered security light

You can adjust the angle of the solar module by moving the adjustment support to the appropriate hook on the mounting bracket. The module comes with a 14-foot cord to help you locate it in direct sun. The unit comes with five fasteners – all you'll need to install the entire unit.

Manhours – It's a simple unit to install. You'll probably spend more time deciding where to install the solar module than actually putting it in. Estimate 0.50 manhours per unit for a one-man crew.

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