I can't remember what colour lights but definitely one pink. I have replaced the others with different ones. The heater that came was a 150 which couldn't heat the tank to 26 even dialled right up so I had it replaced. The replacement was no better. I now have a Eheim 200 watt in there which can heat it to 26, but I doubt it has had to come on since about November as it is currently our summer.