Do HPS and MH lamps explode?
It is recommended by all MH lamp manufacturers that the lights be turned off at least 15 minutes once per week to prevent “non-passive” (rupturing of the lamp) failure. This is a very easy recommendation to adhere to. HPS lamps are designed differently and can operate 24/7 indefinitely and are not subject to “non-passive” failures. Do not spray a hot lamp with water or cleaner. Always wait at least 30 minutes for the lamp to cool before you clean it with standard window cleaner.