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. LED light is too bright. I brought an LED compatible dimmer and changed out the switch for the dimmer. We have led lights half the strand dim and half 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. LED technology has established itself and LED lights have many advantages. First thing to do is check the light to see if it is good. Simple component failure is the other likely option. If not discard the light. Dimmable LED light bulb. It's like the bulb now remembers only the dimmed setting. 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. They are both operated by the same switch. As a result, many people perceive the light as much too bright. 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. But sometimes an annoying effect occurs: Light-emitting diodes radiate their light almost point-shaped. Why are my car's headlights not bright enough? This will go far in helping you buy an adequately bright bulb in the first place. It is important to understand how this happens. I checked the lights and all the bulbs seem to be lit up properly. Remember, LED lights are polarized. Water intrusion - LED "bulbs" are typically complex assemblies with joints, as opposed to the glass envelope of an incandescent floodlight. 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. Many LED strip lights are not intended for outdoor use. So why are my LED 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. Riddle me that one lol Lights should be IP65 rated or higher if you want to put them outside. The major offender is moisture. The white LED bulb is a special case: The white light produced by a white LED is fluorescent light, at least in part. It’s also why they don’t overheat and last so much longer than traditional bulbs. Light is produced because electrons are energized when electricity is introduced to the diodes. The electronic complexity is part of why they cost more than an incandescent bulb. The fist step is to find the LED that is no longer working. If it does not light, reverse the leads and try again. At first, only one bulb dimmed out, then a day or so later the other went. Generally, a short circuit in a single fixture leads to a single light or group of lights not working. I have a chandelier with five lamps. Fluorescent Light Fixture Question: Why is our fluorescent light fixture dim? The bulbs are fluorescent. 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 brought five dimable LED bulbs. All LEDs are sensitive to the temperature of the surrounding environment, so endless days in triple-digit heat will cut your lights’ lifespan short. 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 it lights good. 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 non working LED will obviously be in the string half that is not working. 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