Cutequeen Blue 42mm(1.72") 8-SMD 12V Festoon Dome Light LED Bulbs 211-2 212-2 569 578 - Blue (pack of 10) Size: 42mm(1.72"),Type: 3528 8-SMD,48 Lumen. Color: Blue (with 181 degree light output) Only for DC 12V vehicles The 42mm(1.72") Light LED Bulbs FIT 211-2 212-2 569 578 etc. Notice:All LED bulbs have to be plugged in a certain way,it has Positive and negative, so if they don't work at first, quickly take them out, turn them around 180 degree, and put them back in again.