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It has a light-sensitive photocell, which automatically activates at dusk and overcast skies, and automatically turns off at dawn. These lights interact with the sun and clouds, dimming and brightening the lights. This is to save energy. The interior lighting controls of the building can actually sense when the sun can be used as natural lighting, when it is unavailable or when the clouds cover the daylight. The solar panels used for solar lamp posts are much smaller and are installed on the roof. They use the voltage drop of the energy in the solar module to detect when the sun disappears. The lighting level fluctuates slowly based on the available natural daylight.

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