This is a universally compatible spa side balboa p/n 51854 for Artesian Spas  and is the same as the following Balboa P/n's 50527, VL801D,50872,50859,51679,53167,51575,51285,50857,51139,51058 and Jacuzzi Spas F103000 , K123000

This is an older style requiring 2 bulbs for complete night time illumination, they may need to be replaced, one was working the other not at the time of testing

30 day warranty and easy returns