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　　The use of lighting is now crucial to urban life. I believe we are no strangers to wall washing lamps and projectors. So what's the difference between a wall lamp and a projector? Many people simply mix wall washing lights with projection lights. In modern night lighting, projection lamp and wall washing lamp are high-pressure sodium lamp and metal halide lamp. The projection lamp is a lamp with a specific projection angle, usually between 10 degrees and 140 degrees, while the illumination angle of the wall washing lamp is very wide. It is a lamp that announces about 360 degrees of light in space. Wall washing lamps are mainly used to illuminate the top of buildings at night. The differences between wall washing lamp and projection lamp are explained in detail below.

　　Features of wall washing lamp. When it comes to the difference between wall washing lamp and projection lamp, I believe most people are confused and don't know the difference between wall washing lamp and projection lamp. First, let's understand these differences. The feature of the wall washing lamp is that the light effect of the wall washing lamp is uniform from a specific point to all directions, and can be placed in an arbitrary position in the scene. Whether it can be placed outside the scale of the camera or inside the object. It is common to use different color wall washing lamps in remote settings. The wall washing lamp can project and mix the darkness on the model. The wall washing lamp has large illumination scale, simple illumination function and many auxiliary purposes.

　　Features of projection lamp. The main difference between wall washing lamp and projection lamp is the lighting scale. The projector is controlled by a built-in microchip and can be used in small engineering applications to complete gradual changes. DMX can also manipulate dynamic actions (such as jumping, color shining, random shining, mutation) to complete special actions (such as chasing and scanning). At present, the application fields of projection lamps include: single building, internal and external lighting, external lighting of historical buildings, indoor local lighting, billboard lighting, green landscape lighting, atmosphere lighting of bars and dance halls, etc.

　　Projection lamps can be equipped with incandescent bulbs or energy-saving lamps from the source. Yellow when incandescent lamp is installed. When installing the energy-saving lamp, it can be white or yellow according to the bulb type. The light source direction of the projector bulb cannot be adjusted. In the figure below, we can directly see the fluorescent tube of the projector, and there is a glass cover outside the projector. Ordinary household spotlights use quartz bulbs or beads. Of course, large spotlights don't have to use quartz bulbs. Quartz bulbs only have yellow light. The light source direction of ordinary spotlight can be adjusted freely.

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