T5 wall washer, as its name implies, is a wall washer that uses T5 fluorescent tubes as the light source of the lamp. After listening carefully to the explanation of the technicians, the main meaning is that the T5 wall washer is a product to reduce the cost of high-power wall washer and extend the life of the high-power wall washer, so it cannot become the mainstream lamp for outdoor lighting fixtures. Since the speed of light is dispersed after lighting, its luminous effect is similar to floodlights, also known as "strip floodlights", and there are certain restrictions on the luminous mode, mainly yellow light and white light.

Most of the wall washer products on the market are mainly high-power wall washer. The light source is a single 1W-3W patch light source and anti-lumen light source. Its luminous characteristics are concentrated beam and long projection distance. , The color is changeable. In terms of waterproof performance, high-power floodlights are fully potted waterproof or structural waterproof technology, which is better than T5's waterproof performance.

We know that LED optical lenses are generally divided into "primary lens" and "secondary lens". The "lens" often referred to by the manufacturers of outdoor lighting lamps and lanterns mostly refers to the "secondary lens" connected to the outside of the light source. The primary lens actually refers to the light source itself, and we will focus on it below: "secondary lens" is abbreviated as "lens".

Common lenses have the following materials: