What are the advantages and disadvantages of common LED optical devices?

Ultra-thin lens has a small thickness but low optical efficiency, about 70%~80%.

TIR lens (total internal reflection lens) has large thickness and high optical efficiency, which can reach about 90%.

Fresnel lens, with an optical efficiency of more than 90%, can leave enough space for structural design to dissipate heat, but it is easy to produce weak concentric circles at the edge of the light spot.

The lattice mirror reflector cup mixes light evenly, the glare is difficult to control, and it is easy to produce secondary glare.

The reflective cup with smooth mirror surface has good texture and can control glare well, but it is difficult to mix light evenly.

The diffuser is light in material, with different light transmittance options, and the light transmittance is only about 60%~85%, which is easy to produce secondary glare.

The light transmittance of cloth glass is about 90%, but it is easy to produce secondary glare.

The light spot of sandblasted glass is uniform, and the light transmittance is difficult to control, only about 70%~85%.