LED lights have come along a lot over the years
I still remember those little LEDs that you used to get on the calculators many years ago. It used to be a popular topic in computer science courses to develop a logic circuit to make them do all kinds of tricks.
One of the really big plus points about them was always that they lasted pretty much forever but until fairly recently that simply meant that your trusty calculator from the 1970s would still display numbers today (so long as the rest of it remained operational, of course). However, in recent years there’s been a major move to producing led light bulbs that retain similar properties to the LEDs from those ancient calculators and you’ll probably have seen them used in those dinky little keyring torches.
Whilst they’re not, yet, at the point where you could replace all your light bulbs with their LED equivalent they’re heading that way and already you can find a surprisingly wide range available that would do the biz quite nicely in lots of areas around your home. Definitely worth looking into for their long lasting and low power properties and, yes, they don’t just come in red as their distant relatives in your 1970s era calculator did!
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