Most OEM projectors out there come standard with what is known as
"fresnel" lenses. These projector lenses have circular lines molded into
their surface, and are often produced with less than optically clear
glass. So what? Well the fresnel lines and frosted/ translucent glass
dim the output and soften the beam pattern so the projectors are not
performing to their full performance and aesthetic capabilities. A true
clear lens will help unleash the true potential of the projector
compared to the "detuned" stock lenses. As mentioned above- think of a
projector just like any other original part on your car, of course there
will always be an aftermarket performance/aesthetic upgrade available. Read more about Clear Lenses at TRS Tech.