Done my daylight project months ago... but its powered from normal AA DC batteries as too lazy to do the voltage regulator & don't want to mess around with the car's 12V batt. Had some resistors in else would hv drained my batts long time ago coz I left it switched for hours (in carparks) so many times! Parallel, 5 each side, but limited viewing angle, only cars directly infront can see it. Putting in reflectors won't help much. Maybe will increase the number of LEDs later.