This page provides a general overview of the Large Apparatus emergency warning light requirements of the “NFPA 1901 Standard for Automotive Fire Apparatus – 2016 Edition”. The NFPA 1901 standard defines a Large Apparatus as an apparatus that has a bumper-to-bumper length of 25 feet or more, or an apparatus that has the optical center of any optical warning device at greater than 8 feet above level ground.
Each apparatus, 25 feet long or greater, is divided into eight (8) warning zones – four upper and four lower.
Calling for Right of Way: Apparatus responding to an emergency. Blocking Right of Way: Apparatus at emergency scene. White light not permitted.
The minimum flash rate allowed is 75 flashes per minute for any single optical source and 150 flashes per minute from all of the light sources visible at any data point (i.e., at least two warning lights are required in each zone). Failure of a lighting device should not leave a data point without a signal.
For vehicles 25 feet or longer: Light energy at each data point on the horizontal plane must be a minimum of 10K and 3.5K at +5o.
A midship optical warning device shall be mounted on both the right and the left sides of the apparatus if the distance between the front and rear lower-level optical devices exceeds 25 ft (7.6 m) at the optical center. Additional midship optical warning devices shall be required, where necessary, to maintain a horizontal distance between the centers of adjacent lower-level optical warning devices of 25 ft (7.6 m) or less. The optical center of any midship mounted optical warning device shall be between 18 in. and 62 in. (460 mm and 1600 mm) above level ground.
(Four) 6x4, Red/White LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Red/Blue LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Red LEDs, Red Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Red LEDs, Clear Lens. (Two) per side.
Bezels sold separately
(Four) 7x3, Red LEDs, Red Lens. (Two) per side. Bezels sold separately
(Four) 7x3, Red/White LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 7x3, Red/Blue LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 7x3, Red LEDs, Clear Lens. …
(Four) 9x7, Red LEDs, Red Lens. (Two) per side.…
(Four) 9x7, Red/White LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 9x7, Red LEDs, Clear Lens. (Two) per side.…
(Four) 6x4, Red/Amber LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Amber LEDs, Amber Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Amber LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 7x3, Amber LEDs, Amber Lens. (Two) per side. Bezels sold separately
(Four) 7x3, Blue/Amber LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 7x3, Amber LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 9x7, Amber/White LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 9x7, Amber LEDs, Amber Lens. (Two) per side.…
(Four) 9x7, Amber LEDs, Clear Lens. (Two) per side.
(Four) 6x4, Blue/White LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Blue/Amber LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Blue LEDs, Blue Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Blue LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 7x3, Blue LEDs, Clear Lens. (Two) per side.
(Four) 7x3, Blue/White LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 9x7, Red/Blue LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Amber/White LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 6x4, White LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 7x3, White LEDs, Clear Lens. (Two) per side.
(Four) 7x3, Amber/White LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 9x7, Blue/White LEDs, Dual-Color, Clear Lens. (Two) per side. Bezels sold separately
(Four) 9x7, White LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Red LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 7x3, Red LEDs, Red Lens. (Two) per side.…
(Four) 7x3, Red LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 4x3, Red LEDs, Red Lens. (Two) per side.
(Four) 4x3, Red LEDs, Clear Lens. (Two) per side.
(Four) 6x4, Amber LEDs, Amber Lens. (Two) per side.
(Four) 7x3, Amber LEDs, Amber Lens. (Two) per side.
(Four) 9x7, Amber LEDs, Amber Lens. (Two) per side. Bezels sold separately
(Four) 9x7, Amber LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 4x3, Amber LEDs, Amber Lens. (Two) per side.
(Four) 4x3, Amber LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 6x4, Blue LEDs, Clear Lens. (Two) per side Bezels sold separately
(Four) 7x3, Blue LEDs, Blue Lens. (Two) per side. Bezels sold separately
(Four) 7x3, Blue LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 9x7, Blue LEDs, Blue Lens. (Two) per side.
(Four) 9x7, Blue LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 4x3, Blue LEDs, Blue Lens. (Two) per side. Bezels sold separately
(Four) 4x3, Blue LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) 7x3, White LEDs, Clear Lens. (Two) per side.…
(Four) 9x7, White LEDs, Clear Lens. (Two) per side.…
(Four) 4x3, White LEDs, Clear Lens. (Two) per side. Bezels sold separately
(Four) MPS12U, Red LEDs, Clear Lens. (Two) per side.
(Four) MPS12U, Amber LEDs, Clear Lens
(Four) MPS6U, Red LEDs, Clear Lens. (Two) per side.
(Four) MPS6U, Amber LEDs, Clear Lens. (Two) per side.
(Four) MPS6U, White LEDs, Clear Lens. (Two) per side.
(Four) MPS3U, Red LEDs, Clear Lens. (Two) per side.
(Four) MPS3U, Amber LEDs, Clear Lens
(Four) MPSW9, Red LEDs, Clear Lens
Chrome bezel sold separately
(Four) MPSW9, White LEDs, Clear Lens
(Four) MPSW9, Amber LEDs, Clear Lens
(Four) MPSW9, Blue LEDs, Clear Lens
