I've been using LED bulbs in my house for a while now. They're much more efficient than traditional lightbulbs (90% less power.)
Recent advances in laser technology may mean another leap in efficiency. Arizona State researchers have demonstrated a new "white laser" that could be used for lighting and LiFi signaling. LED lighting has been demonstrated for LiFi in the past, but the higher efficiency and faster switching time of a laser could mean 10 to 100 times faster communications.
It's a few years from commercialization - it's just a PoC today - but if/when it finally happens it could usher in a new era of local area communications and even more efficient lighting schemes.
For more information: https://asunews.asu.edu/20150728-worlds-first-white-laser
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