water submersion + plus
I really needed a waterproof head lamp and didn't want to shell out big bucks so I started with this lamp and added some silicon sealer around all of the edges, seams and at the gasket thereby waterproofing this thing. It has held up through a few night surfs and is going strong. Obviously when the batteries die I'll have to repeat the processes. I'm not sure how much of the waterproof is due to the silicon sealer or the product's design, but the combination has worked great for me. At this price, it fit the bill and I can afford to lose or break one of these, knock on wood.