289 / 348
TECHNICAL INFORMATION
Truck-Lite Full Line Product Catalog
Customer Service: 800-562-5012 / Technical Support: 888-562-5012
287
TEC
Would it be alright to mount a light at an angle that isn't "square" on the vehicle?
"Maybe." You need to contact the Lab for a test in that position; otherwise, it can be questioned by NHTSA or enforcement
officials.
Can I ever use the Model 40 with Reflex reflector ring legally?
Yes, as follows: On any vehicle under 80" wide. As an "extra" light on over 80" (reflex is legal). On vehicles made in 1991 or
earlier, when installed by the vehicles owner, although most states enforce the Federal requirement.
Is "SAE" or "DOT" lettering required on lights?
No lettering is required by NHTSA (108) except for headlights and conspicuity tape. The Federal Motor Carrier Safety
manual mentions that some lights should be marked "SAE" but this is not enforced. Truck-Lite marks all their lights with
"SAE" and/or "DOT" markings.
Are there any special lighting requirements for vehicles hauling flammable or explosive
materials?
There are no "special" Federal requirements as "108" covers all over-the-road vehicles. Some states or municipalities have
regulations, but these cannot "supersede" 108, they can only add to it. Truck-Lite’s sealed lights and wiring systems have
been tested to all known standards and certification. Reports are available from the Truck-Lite lab.
"108" says that some lights must be mounted as high as "practical." What is "practical?"
NHTSA has stated that the vehicle manufacturer has the responsibility to choose the best mounting location "in light of the
particular design/configuration of the vehicle involved" and they will not contest it unless it is "clearly erroneous." Recently,
Canada has started to strictly enforce the word practical as meaning "capable of being done." In the case of sidemarkers,
not more than six inches from the edge of the vehicle.
My customer wants to use a light for a "side turn" that isn't listed for that function. Is this OK,
seeing as how side turns aren't required anyway?
Be careful that it doesn’t violate some state laws regarding color or location. If it is also used as a side marker, that function
must be listed on the lens code.
My customer wants to add some auxiliary lights (ie. illuminated signs, deceleration lights,
decorative lamps). Are these legal?
Yes, provided they do not: Render inoperative any device in compliance with "108," negatively affect the performance of
required equipment, create confusion or misunderstanding of lighting signals. Always contact the Truck-Lite Lab if you
have any questions.
Frequently Asked Questions