They are much dimmer than what they should be..does this mean there's a short someone along the line? Or maybe a bad light bulb somewhere? My volt meter is reading 13 volts out from the power pack, yet it is rated for 20. Without the load, it's pushing 19.9. All my lights combined are only using 1/100 an amp of current. All my lights are wired in parallel to a main bus. What could be the problem? Also, what does it mean if a light bulb lights up much brighter than others of the same type? Does that mean it shorted?