SAWE 27mm / 28MM 6-SMD 3528 Festoon Dome Map Interior LED Light Bulbs Lamp DE3022 DE3021 (8 pieces) (White) Package Included: 8 x 27mm / 28MM 6-SMD 3528 Festoon Dome Map Interior LED Light Bulbs Lamp DE3022 DE3021 (White) Cross Reference: DE3021 DE3022 3528. Only for DC 12V vehicles Interior Light, Dome light, Map light, Door light, Cargo/Trunk light, Glove Box light, License Plate light ect. Notice: All LED bulbs have to be plugged in a certain way, it has Positive and Negative. Simply flip it 180 degrees if the LED does not light up.(Reverse the polarity) SAWE is a registered trademark protected by the US Trademark Law. Make sure buy from "" SAVEICON "" to get the quality and authentic product plus the Superb Customer Service.