The efficiencies enjoyed by fleets using LED stop-turn-tail, and marker lights have economy-minded managers pressing lamp suppliers for white LEDs, and they're coming. They just aren't quite as inexpensive as they need to be to make them competitive in many applications. White LED technology has progressed currently to where developers are putting a ceramic coating on the surface of the blue emitting LED that contains a very uniform thickness of phosphor. When white LEDs first became available, suppliers started offering products like license plate and convenience lights for inside sleepers. As output increased, they moved on to backup and work lights. The next obvious frontier was forward lighting. LED technology has advanced to a point where an entire truck could be outfitted with LEDs. It could be done, but it would still be a costly option in the most desirable applications, forward lighting in particular. However; this same situation existed when red and amber stop-turn-tail LEDs were first introduced.
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