Warren on Apr 3, 2010 - 11:55 AM This light was a workhorse for me in the 1960's when I lived and dived on Guam. It had a very bright beam which lasted well over six hours, but you had to work at keeping the water out at depths over 30 feet. I usually sealed the beam to the rubber grommet with finger nail polish. I still have the light, but it has not been in the water for decades. Send E-Mail Reply to Warren Your Name: Your E-Mail Address: Message: >>Original Message on Apr 3, 2010 - 11:55 AM:<br>>>======================<br>>>"This light was a workhorse for me in the 1960's when I lived and dived on Guam. It had a very bright beam which lasted well over six hours, but you had to work at keeping the water out at depths over 30 feet. I usually sealed the beam to the rubber grommet with finger nail polish. I still have the light, but it has not been in the water for decades."