Review on 🔆 Ming's Mark 25011V LED Bulb 921 Base - Warm White, 6-Pack by Paul Evangelista

I use these in ceiling lights on my boat. Features: 1) They don't care about polarity and work with any connection. 2) They work correctly over a wide voltage range. Many of the cheap ones only work on 12V and don't handle the charging voltage very well (14+ volts - motor running for example). In my tests, the light output did not change between 11 and 16 volts. Under 11 they start to fade. 3) The head rotates so you can direct the light where you want regardless of the orientation of the nozzle. 4) Light is emitted from one side only - good for dome lights. The luminous flux is subjectively slightly better than that of the standard 921 lamp - somewhat whiter and brighter. I measured 130 candelas. For reading, it must be within 2 feet of the page to provide at least 350 lux illumination. This may not be good for reflector mounts designed for an omnidirectional lamp. 5) Low power consumption - 0.23A at 12V - about 2.75W. This is much lower than the corresponding standard lamp, but higher than other LEDs. The voltage regulator is likely drawing additional power. 6) No problem with continuous use. The device heats up, but does not heat up. Car reverse light LEDs can overheat if left on. 7) They are wider and taller than standard bulbs so please measure your fixture. I don't know how good the durability is yet.