After years of rarely diving I'm in the process of re-gearing.My old dive light was a Princeton Tec with a magnet on/off switch that activated a reed switch internally. Well it just wouln't work anymore so a electrician friend offered to replace the reed switch if I could get parts. I e-mailed princeton tec and they said to send it back to them for free repair or replacement.I just wanted to say this is one heck of a good company to take care of a light that they made almost 20 years ago.My next light will come from them..Mark