ST21 DC Strobe Warning Light

ST21 DC Strobe Warning Light

Category: Application:

The ST21 is a compact strobe warning light excellent for indoor or outdoor signaling, safety, or warning applications. Auto-voltage design allows this light to work where input DC voltage is 12VDC-48VDC. Available in permanent mount (pedestal) or magnetic mount (plugs into a vehicle’s DC adapter) models. Dome colors available: Amber, Blue, Clear, Green, Purple, or Red.

  • High output 3-4 Watt – 3.6 joules
  • 70 to 80 flashes per minute
  • 360° Fresnel / fluted lens
  • Low current draw, under 350 mA at 12 VDC
  • 6 1/2″ high, 5-1/2″ diameter, Shipping Weight, 2 lb
Part Number Mounting Voltage
ST21-P Permanent 12-48 VDC
ST21-M Magnetic 12-48 VDC
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Strobe Light Installation (English/French) Download
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About Us

Tri Lite, Inc. manufactures specialty electrical products including loading dock lights, portable task lights, warning lights and beacons.

get in Touch

  • (800) 322-5250 or (773) 384-7765
  • (773) 384-5225 (fax)
  • info@triliteinc.com
  • 845 N Larch Ave, Elmhurst, IL 60126

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Special Features

Swing Hinge

Swing Hinge Dock Light Arm

“Swing” dock lights feature a hinge that allows both vertical and horizontal adjustment of the arm.

Flex Head

Flex Arm Dock Light
Flex dock lights combine the strength of a standard dock light arm with the added flexibility of an impact absorber that bends the head away when bumped by a moving forklift or dock door.

Heavy Duty

Heavy Duty Dock Light
Heavy duty lamp heads are designed for the most demanding environments including wet and damp locations. Their rugged cast aluminum housing includes a shatterproof polycarbonate lens cover.

Fan

Fan Only Dock Light

Fans can be used separately or in conjunction with many Tri Lite dock light heads. The high capacity 3-speed fan provides air circulation and cooling throughout the trailer. 18″ fan rated for 3000 cfm.

Loading Dock Light Heads

Heavy Duty Lamp Head (HLED)

Heavy Duty Lamp Head (HLED)
Virtually indestructible! The HDLED has a cast aluminum body designed for the most demanding environments including wet and damp locations.
Learn more

Metal Lamp Head

Metal Lamp Head
Traditional, powder coated metal light head featuring all steel construction for long life.
Learn more

Polycarbonate Lamp Head

Polycarbonate Lamp Head
Unique, patented polycarbonate head is rugged and economical, it’s our most popular lamp head!
Learn more

Arm Type

Single Strut Arm

Single Strut Arm

Single Struct arms are an economical lighting solution for low to mid volume loading docks. The arm features a hinge that allows both vertical and horizontal adjustment of the arm.

Double Strut Arm

Double Strut Arm
Dual struts give this arm the strength to survive in the busiest and most demanding warehouses. The dual strut design will also support a fan or light/fan combination.
How to Specify Dome Color
How to Pick Dome Color
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