Are the neon lights that you put under your car, legal in california?

Answer 1

They are not legal in California to have them turned on while driving or on public roads. You can have them installed but you may only use them for display on private property or if your car is in an auto show.

See:
http://www.dmv.ca.gov/pubs/vctop/d11/vc21466_5.htm
and
http://www.dmv.ca.gov/pubs/vctop/d12/vc25400.htm

Answer 2

No......... they are not legal

Here is the "official" answer:
Lighting Requirements
25400. (a) Any vehicle may be equipped with a lamp or
device on the exterior of the vehicle that emits a diffused
nonglaring light of not more than 0.05 candela per square
inch of area.
(b) Any diffused nonglaring light shall not display red to
the front, but may display other colors. A diffused nonglaring
light shall not resemble nor be installed within 12 inches or
in such position as to interfere with the visibility or
effectiveness of any required lamp, reflector, or other device
upon the vehicle.
(c) A diffused nonglaring lamp or device, other than a
display sign authorized by subdivision (d), shall be limited in
size to an area of 720 square inches and where any lease,
rental, or donation is involved the installation of the lamp or
device shall be limited to those vehicles operated either
primarily within business or residential districts or
municipalities, or between business districts, residential
districts, and municipalities in close proximity.
(d) An internally illuminated sign emitting not more than
0.25 candela per square inch and possessing copy which does
not contain a white background may be displayed on each
side, but not on the front or rear, of a trolley coach or of a bus
being operated in urban or suburban service as described in
Section 35107 of this code.

Answer 3

there not legal in any state. take them off before you get an expensive ticket, its not the fast and the furious its the real world.

Answer 4

No. Neither are covers on your liscence plates.

Answer 5

no