LED Lights for Livorsi Gauges, Wedge Style. 12.8v. LED lights outshine and outlast incandescent bulbs. NOTE: These do not work with standard Livorsi ELECTRIC DCS 2-1/16" gauges. On those gauges the led is soldered to the circuit board and can only be changed when the gauge is built. These lights only work on 3-3/8" and 4-5/8" Tachs and Speedos, all monster size DC 2-5/8" gauges and MECHANICAL DCS 2-1/16" gauges. Note that 4-5/8" Tachs and Speedos have 2 bulbs per gauge.