Sodium vapor packs emit deep yellow light while LEDs lend a crisp white light. Sodium vapor wall packs take more time than normal to warm up and are quite expensive when it comes to maintenance. A lot of energy these packs produce goes down the drain in the form of heat. Moreover, they flicker on and off- resulting in a shorter lifespan. This is why LEDs are preferable over sodium vapors.
Though fluorescent lighting has been used for a long time because of advantages like not-so-expensive fixtures and higher efficiency, one must not forget the threat they pose to the environment because of the presence of mercury. Also, fluorescent wall packs have a shorter lifespan reason being switching ON and OFF again and again. They also require ballast so the power can be stabilized. These things are not present in LEDs and they work efficiently, producing reduced power bills.
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