Description The Red Wire Is Anode And The Black Wire Is Cathode.These Pre-Wired Led Bulbs Are Perfect For Creating Your Own Custom Led Setup!These Pre-Wired Leds Are Very Helpful Props For Model Train Layout And Building, Train Station Layout, Diy Project Model ,Car,And Miniature Dollhouse. Specificationslight Color: Warm Whiteforward Voltage: Dc 6-12Vforward Current: 20Mawire Length: About 20Cm / 7.9 Inchesled Type: 1.8Mm Diffused Ledlight Socket Size: 3.4*2.4 *1.8Mm/0.13*0.09*0.07 Inch(L*W*T)Package Includes:10Pcs X Pre-Wired Leds Note1. Please Allow 1-3Cm Error Due To Manual Measurement. Thanks For Your Understanding.2. Monitors Are Not Calibrated Same, Item Color Displayed In Photos May Be Showing Slightly Different From The Real Object.