Review on 🚗 Waterproof LED Car Cup Holder Lights - USB Charging Pad with 7 Colors, Interior Atmosphere Lamp - Auto Accessories for Decorative Lighting (Set of 2) by Michael Floyd

Other than that these bulbs work exactly as advertised. Fast charging time (supplied with 1 micro USB cable), activated by vibration (very sensitive), has a photocell that only activates when it does not feel light, but after a full charge (about 2 hours as advertised) lasts up to 12 days. I don't drive far to and from work, so they were only activated for a couple of hours for a couple of days before they started dimming and needed a charge. I'm not sure if it's because they need to be charged since they still work (very dark) or they just don't work well in the cold because I leave them in my car and it's winter in Colorado. At the same time it is quite neat and not expensive.