Review on 🔹 CCiYu 20-Pack Blue T5 Wedge LED 74 37 286 18 Dashboard Gauge Light Bulbs with Twist Socket, 12V, 3-3014 SMD LEDs by Onsommoshit Mathews

Installation guide issue, none. The photos of the seller's products show the bulb and mounting sockets forming a single unit. In fact, you only get lightbulbs. Alignment of the lamp when installing in sockets is critical. I have to remove them from the dashboard several times for them to work properly. Once installed, they come and go as they please, whenever they want to work. Also, blue lights are hard to see during the day or evening, especially warning lights like Check Engine etc. Do not buy this item, not what I think you are paying for.