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This video talk about how great the Led traffic light as compared to the incandescent traffic light. But it's not perfect. And that's where the problem lies. These led traffic light beat incandescent traffic light in almost every way except in very cold weather condition. Led traffic light bulb emits very little heat and during heavy snow and the outside temperature is extreme low, ice will form up on the traffic light and make it very difficult to see the light. This is not a problem with incandescent traffic light. This prompt news and many people living in cold countries to want to revert back to incandescent traffic light. So this youtuber point out a very important fact and lesson that we could learn from this incident. He point it out as "but sometimes". When newer technologies come and have great benefits and beat older technologies in almost every way, when the only one aspect that the old technology win, people start to compare and blown things out of proportion. The blown out effect is such that it will say until the older technology is alot better then the newer technology whereas in actual fact it is the opposite. This episode could also be a learning for everyone be it individuals or to companies at management level to even ministers who make decisions on policies to understand the danger of "but sometimes" issue. This is so that we could be very clear headed and take a stepback and look into the issue. The new invention vs the old one and look at the fact sheet, statistics and then reconationalize on the benefit vs the side effects instead of purely based on public perception and or feedback.