DE3175 LED Bulb, 27mm 28mm LED Car Festoon Dome Bulb for Car Interior Reading Map Door License Plate Light 12V (27mm, Warm White) 4PCS

I thought I was buying a set of bulbs that would be brighter than the incandescents they would be replacing. Not so, at least not visibly so. Maybe on paper using a luminance tester they are. But, at least they are not any dimmer and they are using lower power. They're also less expensive than other choices on Amazon, so factor this into your decision. I may try to find a different bulb since this is going in a vehicle and I would like it to be brighter inside.

I do like the quality of light that this little package provides.

Seem pretty good. Although made out of plastic, these are the closest in color and brightness to incandascent OEM. Some of the other LED versions were wayyyy too bright plus even those LED chips ran pretty hot.If you are NOT a teenager and DON"T want 3,000 hyperwhite lumens from your dome light, this is for you. Can't comment about longevity; just got it today. At just over $5 the price is right too.

Put warm white in the basket. Received the white version.The images don't match the sizes.Overall a poor product representation and buying experience. I assume that is why this product is returned a lot. Perhaps there is something that can be improved in the product representation.The lamp seems to work well in my Technics receiver. It's only been running about 8h so far.

I've been using these bulbs for quite some time now as my primary license plate lights on my vehicle. I ordered a set recently and found that there have been some manufacturing changes which cause these lights to fail and could result in a fire. To be clear, the previous version lasted over a year as a plate light and are continuing to function on other vehicles. I prefer the LED warm white bulbs as they look OEM and keep the temperatures and voltage down. If you keep your vehicles for a while and you do your own maintenance, you know that a hot bulb will damage plastic housings after a while.After installing the replacement bulb, I noticed it stopped working after only a few hours. I figured it was just a bad bulb and replaced it the next day. Again, the same issue occurred, and I noticed that bulb was out also. When I went to install the third, I found that it had failed after only a few hours. I took all of the failed bulbs and returned them. I assumed there was a defect with that set, so I ordered another pack. Once those arrived, I took a few apart along with one of the older bulbs that had lasted over a year. The differences were clear.First issue with the new set is that they are now using a different resistor. This resistor gets extremely hot and actually melts the outside tube. You can see in the assembled comparative photo that the top (newer) bulb looks smaller. It appears this way because the heat is melting the tube and causing it to shrink which is what is ultimately causing the failure. The heat melts the tube which causes it to shrink under the spring tension in the housing and eventually disconnects itself from the circuit. Luckily this did not cause a fire or any other damage to my vehicle.In the disassembled bulbs, we can see the newer version is on top and the older version is on the bottom. It appears they've upgraded the "filament" LED portion to a thicker and seemingly stronger component. Unfortunately the resistor is an incorrect match. Maybe they did this to save space in the smaller 36mm housing? Unsure.I ordered the older style / rating resistors and installed them in the surviving bulbs which seems to work. You can find them here on Amazon as "E-Projects 25EP514680R 680 Ohm Resistors, 1/4 W, 5% (Pack of 25)". If you're handy with a soldering iron you will be able to replace them fairly quickly as the end caps on the bulbs are simply pressed on.Very disappointed as these little lights are perfect for the application, and now are simply unusable without taking them apart and modifying them. Hopefully they rectify this issue in the future and go back to the original components.

Ordered both the 36mm and then the 39mm due to error on my part, but in doing so can corroborate the other review on here regarding differing resistor values.The 36mm bulb, you can see a small blue resistor if you peek in. When I remove the caps to pull out the bulb filament, I can confirm it is a 680ohm resistor. This is good.The 39mm bulb has a tan resistor, and is 100ohm. If you use this as-is, there likely will be too much current passing through the filament than the filament itself can handle over time. This is bad.My solution was to remove the caps on the 36mm and take out the bulb filament that had a blue resistor, and place them in the longer 39mm tube. In fact, I broke open two 36mm bulbs to get two bulb filaments, each with a blue resistor. Putting both into the 39mm tube doubled the brightness, but consumes only one-fourth of the power of a single incorrect tan resistor bulb filament. This is a good setup.Highly recommend returning any bulb that arrives with a tan resistor. It won’t cause a fire, but the bulb won’t last long. Or, you can acquire a set of through hole resistors and solder those on. Very easy to do.