Simple component failure is the other likely option. As a result, many people perceive the light as much too bright. LED light is too bright. The electronic complexity is part of why they cost more than an incandescent bulb. 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! Why are my car's headlights not bright enough? Lights should be IP65 rated or higher if you want to put them outside. Dimmable LED light bulb. 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. New LED Bulb Is Not Bright First of all, you need to know that for LED bulbs, you need to look for Lumen rating as opposed to Wattage rating (as is the norm for traditional bulbs). I checked the lights and all the bulbs seem to be lit up properly. If not discard the light. It's like the bulb now remembers only the dimmed setting. The white LED bulb is a special case: The white light produced by a white LED is fluorescent light, at least in part. Many LED strip lights are not intended for outdoor use. Remember, LED lights are polarized. The bulbs and dimmer worked for a little while, but then the bulbs stayed dim when the dimmer was bright up to full brightness. At first, only one bulb dimmed out, then a day or so later the other went. It’s also why they don’t overheat and last so much longer than traditional bulbs. For example, when your central air conditioner clicks on, you will notice the LED lights dim or flicker slightly because of surge wattage. All LEDs are sensitive to the temperature of the surrounding environment, so endless days in triple-digit heat will cut your lights’ lifespan short. 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. Light is produced because electrons are energized when electricity is introduced to the diodes. I brought an LED compatible dimmer and changed out the switch for the dimmer. So why are my LED lights not working? Fluorescent Light Fixture Question: Why is our fluorescent light fixture dim? 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. The major offender is moisture. So using a "light fixer" for the original mini lights, remove the bulb from the socket and touch the leads to the light tester. The bulbs are fluorescent. The non working LED will obviously be in the string half that is not working. I have a chandelier with five lamps. 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. But sometimes an annoying effect occurs: Light-emitting diodes radiate their light almost point-shaped. The fist step is to find the LED that is no longer working. LED technology has established itself and LED lights have many advantages. 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. Water intrusion - LED "bulbs" are typically complex assemblies with joints, as opposed to the glass envelope of an incandescent floodlight. We have led lights half the strand dim and half bright. My kitchen lights have dimmed down to the point where we can barely see that there’s electricity even getting to them. Riddle me that one lol I brought five dimable LED bulbs. It is important to understand how this happens. If it does not light, reverse the leads and try again. They are both operated by the same switch. If it lights good. 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