When "Waterproof Cooling Fan" during the mandatory cooling system design should ensure that the fan outlet or inlet is always facing the wind fin gap. This radiator placed in a square enclosure, the front is smooth, this side towards the ground when the lights work, because the chip are arranged in this plane, no extra space arrangement "Waterproof Cooling Fan", bathroom led lights if the following wind direction fan fan arrangement, it is not always satisfy said before facing the heat sink, dramatic changes in wind direction and the cross-sectional area of the flow of the cooling effect will be weakened, obviously can not flow smoothly through the gap fins, fin heat can not be distributed, resulting in heat concentrated. led lights quality assurance L "Waterproof Cooling Fan" arrangement.