Whelen Engineering Company, Inc.
5 years warranty

The largest of the M Series, the M9 is a versatile lighthead for many applications.

  • Brake/tail/turn, turn, and back-up lights meet applicable SAE requirements
  • Hard-coated lenses
  • Surface mounts via two screws for easy installation
  • A variety of mounting brackets and optional Chrome or Black flanges are available
  • Can be mounted vertically or horizontally

WARNING: These products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit whelen.com/regulatory.


M9 Series

M9 Standard: 6.5” (165mm) H x 10.4″ (263mm) W x 1.4″ (35mm) D 

M9 V-Series: 6.5” (165mm) H x 10.4″ (263mm) W x 2.7″ (69mm) D 


Amps Simultaneous: 3.0 (peak), 1.2 (average)

Alternating: 1.2 (peak), .6 (average)

DUO™ Series

DUO Warning: 2.4 per color

Combo Warning/Scenelight

Combination Warning/Scenelight: 1.58 (Warning average), 1.53 (Scenelight average)

DUO Combination Warning/Scenelight: 1.58 (Warning average per color), 1.53 (Scenelight average)

Utility Models

Scenelight, including flange: 6.0 (average)

B/T/T: .75 (Brake/Turn average), .55 (Tail average)

Amber turn signal: 1.2 (average)

Back-up light: 1.8 (average)

Scenelight: 6.0 (average)

Light Options Single or Split color


Internal flasher+

Lenses Clear


Flash Patterns* Single color: 159 Scan-Lock™ flash patterns

Double color: 64 Scan-Lock flash patterns

Certifications SAE Class 1 (warning)


NFPA 1901

NFPA 1917



Warranty Five year warranty

* Number of sequencing combinations vary by model

+ Sync or low power functions