This 18 LED Tower is made to replace 194/168/921 wedge base bulbs. It uses 18 x high power SMD LEDs to produce 200 Lumen of light (equivalent to 25-Watt Incandescent bulb). It is powered by 12V AC/DC and provides 360-Degree lighting and reduces hotspots inside your light fixture. It uses only 2.4 watts of power saving you over 20-Watts every hour you have your lights on. If you are on a RV with Solar Power or running off of batteries, you should convert immediately and start seeing the power difference.