The electronic complexity is part of why they cost more than an incandescent bulb. But sometimes an annoying effect occurs: Light-emitting diodes radiate their light almost point-shaped. The Reason LED Lights Dim LED Lights operate through semiconductors and they do not get to the touch, or melt the plastic bulbs they are often placed in, a small amount of heat is released. They are both operated by the same switch. If it does not light, reverse the leads and try again. The bulbs are fluorescent. I brought five dimable LED bulbs. It's like the bulb now remembers only the dimmed setting. Light is produced because electrons are energized when electricity is introduced to the diodes. With the lights plugged in, use the voltage detector to check the live voltage wire between each light, starting at the end that plugs into the wall outlet. Water intrusion - LED "bulbs" are typically complex assemblies with joints, as opposed to the glass envelope of an incandescent floodlight. First thing to do is check the light to see if it is good. We have led lights half the strand dim and half bright. Lights should be IP65 rated or higher if you want to put them outside. Add water, add freeze-thaw cycles, and perhaps a manufacturing flaw on one bulb, water gets where it should not, things don't work so well. So why are my LED lights not working? LED light is too bright. Typically, bright yellow fluorescent phosphors are activated by a high-efficiency blue LED, and the result includes yellow (with some orange and red) as well as the original blue. Why are my car's headlights not bright enough? LED lights are on dimmers: If you have the LED bulbs on a dimmer switch, you will notice the dimming and flickering MORE if the LED lights are slightly dimmed when surge wattage happens. Generally, a short circuit in a single fixture leads to a single light or group of lights not working. My kitchen lights have dimmed down to the point where we can barely see that there’s electricity even getting to them. The non working LED will obviously be in the string half that is not working. I have a chandelier with five lamps. The fist step is to find the LED that is no longer working. It’s also why they don’t overheat and last so much longer than traditional bulbs. So using a "light fixer" for the original mini lights, remove the bulb from the socket and touch the leads to the light tester. If not discard the light. At first, only one bulb dimmed out, then a day or so later the other went. I checked the lights and all the bulbs seem to be lit up properly. It is important to understand how this happens. All LEDs are sensitive to the temperature of the surrounding environment, so endless days in triple-digit heat will cut your lights’ lifespan short. This will go far in helping you buy an adequately bright bulb in the first place. The bulbs and dimmer worked for a little while, but then the bulbs stayed dim when the dimmer was bright up to full brightness. The major offender is moisture. Many LED strip lights are not intended for outdoor use. Found the problem one, but changing the bulb didn't work… My husband put the bulb in backwards by accident and now the whole strand is bright! Dimmable LED light bulb. If it lights good. Riddle me that one lol As a result, many people perceive the light as much too bright. For example, when your central air conditioner clicks on, you will notice the LED lights dim or flicker slightly because of surge wattage. Simple component failure is the other likely option. I brought an LED compatible dimmer and changed out the switch for the dimmer. The white LED bulb is a special case: The white light produced by a white LED is fluorescent light, at least in part. 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