the difference between recessed downlight with lens and recessed downlight with reflector

What is the difference between Recessed Downlight with Lens and Recessed Downlight with Reflector？

LED optics generally have lenses and reflectors.

Recessed Downlight with Lens:

Recessed Downlight with Reflector:

lenses

LED lenses are divided into primary lenses and secondary lenses. What we generally call "lens" is a secondary lens by default, that is, it is closely combined with it in addition to LED lamp beads, COB and other light sources. According to different requirements, different lenses can be used to achieve the desired optical effect.

The main material of the LED lens is PMMA, which has good plasticity and high light transmittance (up to 93%). The disadvantage is that the temperature resistance is relatively low, only about 90 degrees. At present, the main secondary lenses on the market generally adopt total internal reflection (TIR for short) design. The overlapping of these rays results in perfect light utilization and a beautiful flare effect. The efficiency of TIR lens can reach more than 90%, and it is mainly used for small-angle lamps (beam angle <60°), such as Led spotlights and led ceiling lamps.

reflectors

Usually, the light-emitting angle of the LED light source is about 120°. In order to achieve the desired optical effect, the luminaire sometimes uses a reflector to control the light distance, light area, and light spot effect.

The reflector materials are mainly metal and plastic.

Metal reflector: It needs to be stamped and polished, and has deformation memory. It has the advantages of low cost and temperature resistance. It is often used in lamps with low-end lighting requirements.

Plastic reflector: One-time demolding, high optical precision, no deformation memory, moderate cost, commonly used in lamps with low temperature and high-end lighting requirements. And for export companies, plastic cups are easier to pass the safety regulations, and aluminum cups are not easy to pass the safety regulations.