However, warranty issues is a big part of the dive light equation if you are talking about manufacturing lights in China to your spec's, testing and importing them. It doesn't matter how large your profit margin is if 50% of your lights are returned due to flooding. Non diving flashlights are a commodity not dive lights. Dive lights have a better profit margin they just have a smaller market.
You aren't describing a warranty issue. You are describing a failure in design and maybe QC. There is a very important difference.
One cannot "Inspect In" quality. One must design quality into the both the product and the process.
Good design based on a though understanding of the demands of the application, is the starting point. A good design is both robust for the end user, and is tolerant of reasonable variations in the manufacturing process.
Much of the led, hand held portable lighting business now is dominated by foreign producers who offer a "menu" of product choices to firms who want to rebrand those offerings.
A particular emitter mated to a battery system enclosed in a machined tube of some sort. One from column A, one from column B and one from column C. What size and color do you want your logo printed in?
The idea that the rebranding firms have any real design input in these situations is just naive.
The actual producers of these goods view the rebranders correctly as distributors for their products.
A commodity lacks differentiation, and when *Everybody* willing to order some minimum quantity can have the exact same goods, just with a different hot stamped logo, there is no differentiation, leaving only price.
Look at regulators, no reason dive lights should be any different.
Tobin