first off lets clear(no pun intended) some things up about clear tail lights. this goes for California only, other states may vary, but highly doubted, always double check.
clear tail lights are illegal because there is no red reflector facing the rear and side-rear. the lights should be red and visible 500 feet away. there is no way red bulbs will be visible from that far away. heres the code:
CVC24600: (e) Taillamps shall be red in color and shall be plainly visible from all distances within 500 feet to the rear except that taillamps on vehicles manufactured after January 1, 1969, shall be plainly visible from all distances within 1,000 feet to the rear.
http://www.dmv.ca.gov/pubs/vctop/d12/vc24600.htm
next here is the law regarding rear red reflectors on tail lights, the reason why clear tail lights are illegal
CVC24607:Every vehicle subject to registration under this code shall at all times be equipped with red reflectors mounted on the rear as follows:
(a) Every vehicle shall be equipped with at least one reflector so maintained as to be plainly visible at night from all distances within 350 to 100 feet from the vehicle when directly in front of the lawful upper headlamp beams.
When more than one reflector is required, at least one shall be mounted at the left side and one at the right side, respectively, at the same level. Required reflectors shall be mounted not lower than 15 inches nor higher than 60 inches, except that a tow truck, in addition to being equipped with the required reflectors, may also be equipped with two reflectors which may be mounted not lower than 15 inches nor higher than the maximum allowable vehicle height and as far forward as the rearmost portion of the driver’s seat in the rearmost position. Additional reflectors of a type meeting requirements established by the department may be mounted at any height.
http://www.dmv.ca.gov/pubs/vctop/d12/vc24607.htm
and this is why clear corners and 1-piece headlights(yes even these) are illegal. because there is no orange reflector on the front side on clear corners and 1-piece headlights.
CVC24608:Motortrucks, trailers, semitrailers, and buses 80 or more inches in width manufactured on or after January 1, 1968, shall be equipped with an amber reflector on each side at the front and a red reflector on each side at the rear. Any vehicle may be so equipped.
(b) Motortrucks, trailers, semitrailers, housecars, and buses 80 or more inches in width and 30 or more feet in length manufactured on or after January 1, 1968, shall be equipped with an amber reflector mounted on each side at the approximate midpoint of the vehicle. Any such vehicle manufactured prior to January 1, 1968, may be so equipped.
(c) Required reflectors on the sides of vehicles shall be mounted not lower than 15 inches nor higher than 60 inches. Additional reflectors of a type meeting requirements established by the department may be mounted at any height.
(d) Reflectors required or permitted in subdivisions (a) and (b) shall be so maintained as to be plainly visible at night from all distances within 600 feet to 100 feet from the vehicle when directly in front of lawful upper headlamp beams.
http://www.dmv.ca.gov/pubs/vctop/d12/vc24608.htm
those of you who want to debate with me on this can, but i don’t see the point since i have done some research on whats legal and whats not with lighting. again this only applies to Ca.