I've not tried the nicli-eye but me and my partner switched to the moon nite led blacklights and really like them. They have two series the halfmoon and the full moon. We have two halfmoons which are only about 2 1/2 inches long and are powerful little devils. The full moon version is about 5 inches and should do really well on a 20 footer. Really put out a quality light and wouldn't trade them for anything. We bought the half moons for about 85 bucks a piece and the full moon was around 135 I believe.