The SV-Q10K is built tough for the abusive demands of harsh environments. Whether your in 1 foot or 10,000 feet of water the SV-Q10K is the light for you. With it's versatile mounting bracket this light adapts well to almost any application. Simple and proven designs are the key to dependable equipment. The SV-Q10K uses only 2 O-rings for sealing, reducing potential leakage problems. If a small amount of water were to enter the light during a bulb change, this would produce steam pressure and possible risk of explosion. An internal over pressure purge designed into this light eliminates this problem.