Is the housing watertight for when it rains and snows?

The projector is watertight; it can be used in rain or snow. It should be installed 15-30 feet away from the house.  And yes it is watertight, but for eliminating all possible hazards, make sure that your outdoor electric circuits are all protected by either a ground fault circuit interrupter (GFCI) circuit breaker or receptacle. All modern houses should have them, but a lot of older houses don’t. If you don’t know what they are or how they work, get an electrician to check. You may have some, but they can be incorrectly installed. Again, make sure they work properly. There is plenty of information available about them. For detailed info check out our complete laser christmas review page