4-inch green Cold Cathode tubes can be used to light the undersides, air vents and and other small gaps of motorcycles. These tubes are high bright/low heat, and 3.0 mm in diameter, they give between 28,000~30,000cd/m² of light with a current draw of 5.0mA @ 12v-Dc. Their lifetime is up to 30,000 hours (when looked after).
GhostBikes Green cold cathode tubes come in a kit form and all kits contain a pair 4-inch of tubes, a 680v-AC inverter and the wire to connect the kit to your loom. They also come with velcro tape. (I suggest you change velcro for double sided trim tape or cable ties available for all good car spares shops). GhostBikes cold cathode kits are compatible with sound control modules.