4 PCS LED Car Festoon Dome Interior Light 31MM 36MM 39MM 41MM COB Filament Reading Map Door Bulbs,Refrigerator Light Bulbs, RV Fridge Light Bulbs (Warm White, 36MM)

I really hate 'blue' LEDs - 'daylight', 'cool', whatever you want to call them, I find them very unpleasant for lighting interior spaces. Some previous owner had replaced the incandescent festoon bulbs in my car with some intensely bright, non-dimming, blue-toned LEDs. They were also bedecked with enormous heat-sinks, and still managed to get incredibly hot.I was pretty pleased to find this listing, and I tried a batch. So far, so good. They all lit well, the color was a vast improvement, and they dim pretty well (but not as smoothly or naturally as an incandescent bulb, to be fair).A word of warning, however: When I put them in at first, I paid little attention to how I did it (other than to get them the right way 'round - end-for-end - they are polarized and only work one way). I was bothered that they appeared to not only vary in color temperature (from quite warm, to middle-of-the-road, perhaps 2700k to 3200k?) but also in brightness/intensity. I was a little disappointed.Then when I was putting the last one it, I rotated it in the socket as I was trying to get it to snap... and I noticed that the light is not the same around all 360 degrees of the bulb. Apparently the "filaments" have the micro-LEDs down a single side, while they have the yellow phosphor coating (that makes the light more even and warmer) all the way around. As you spin them in their sockets you will notice a brighter side and a dimmer side (not a lot, but a bit), and the apparently color is different too.I don't find it a problem. You can rotate them so that they all look the same. One might even see it as a benefit, since you can sort of use that rotation to fine tune the brightness and color (but only together, not separately) of the bulbs. I would certainly buy them again.

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'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.

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.

These are an excellent LED replacement for the original rear incandescent bulb in my 2015 Jeep Wrangler Unlimited. I don't like the cold blue light from most LED replacement bulbs but wanted brighter lighting. These bulbs are much brighter while retaining a true warm 2700K color... maybe even closer to 2400K. The 41MM warm light bulb fit perfectly and matches the other lights in the interior.