I have security light fitted side of my house. About 3 meters away there is boiler flu.Because this side is exposed to wind ,boiler smoke keeps trigering the light on .I was thinking to move light up furthest away so it can not be switched on by smoke.To move light away we have to fit some sort of water proof junction box.What type of water proof box is needed and what IP rating should it be,this area is exposed to rain.Thank you.