Bought 2 of these. Opened 1 and installed on master bath toilet. Husband is disabled and thought it would help him at night. It worked maybe 2 nights and then changed to color red.( yuck in a toilet) and ran the batteries right out. Opened the second one, thinking the first one was a fluke... nope worked for about half of 1night and is now red, and either on all the time or off all of the time... which defeats the purpose. Hate that they don't work. Good idea, bad engineering. My brother the electrician laughed at me...