Model 121X rotating light flashes 90 times per minute and produces a 360° visual signal. Model 121X covers an entire range of possible mounting configurations – including dome up.
This corrosion resistant unit’s copper-free aluminum housing is finished with a powder coat.
The 121X uses a synchronous motor to drive a parabolic reflector around an incandescent lamp. This results in a 360° rotating beam which is concentrated in a horizontal plane.
The 121X features a spring clip-mounted lamp for quick access when inspecting or relamping. The 121X can be paired with a pendant, ceiling or wall mount. Installation is simple – with the mounting box in place, the fixture is threaded onto the mounting box, making the electrical connection.
Federal Signal’s rugged 121X warning light is designed for explosion-proof applications and/or corrosive environments. It is ideal for use in indoor and outdoor areas such as oil rigs, mines, refineries, and chemical plants.


Mount 121X Explosion-Proof Rotating Light
Optional Wall Mount Kit
Optional Ceiling Mount Kit
Voltage 24VDC
Operating Current 1.05 Amps at 24VDC
Light Source/Lamp Style Incandescent
Lamp Life 800 Hours
Operating Current 90
Candela 2,350 at 24VDC
Operating Temperature Minimum -67 °F
Operating Temperature Maximum 150 °F
Enclosure Rating Type 4X
Ingress Protection (IP) IP66
Ingress Protection (IP) IP69K compliant
Dome Guard Sold Separately
Net Product Weight
Signal without Mounting 13.9 lbs
Ceiling Mount 4.5 lbs
Pendant Mount 2.0 lbs
Wall Mount 5.9 lbs


IP69K Compliant Products Video (1:33)

Ordering Information

Model Types
Model Description UPC
121X-024A-MOD Explosion-proof rotating light, modular, 24VDC, amber 782979232766
121X-024B-MOD Explosion-proof rotating light, modular, 24VDC, blue 782979232773
121X-024C-MOD Explosion-proof rotating light, modular, 24VDC, clear 782979232780
121X-024G-MOD Explosion-proof rotating light, modular, 24VDC, green 782979232797
121X-024R-MOD Explosion-proof rotating light, modular, 24VDC, red 782979232803
WMXC-4-SB Mounting kit, 90 degree wall, 4-wire, 27XST, Series B 782979231202
PMXC-SB Mounting kit, pendant, 121X, 24XST, 27XST/XL, Series B 782979231189
CMXC-SB Mounting kit, ceiling, 121X, 24XST, 27XST/XL, Series B 782979229513
Product # Description UPC
DGXC-SB Dome guard, explosion-proof lights, Series B 782979229537
Replacement Parts
Description Part Number UPC
Dome Assembly, Explosion-Proof Light, Black K8436147A 782979128052
Lamp, Incandescent, 24VDC K8107A041 782979106326
Amber Lens & Mechanism, 24VDC K8444269A 782979110170
Blue Lens & Mechanism, 24VDC K8444269A-01 782979112761
Clear Lens & Mechanism, 24VDC K8444269A-02 782979110194
Green Lens & Mechanism, 24VDC K8444269A-03 782979112778
Red Lens & Mechanism, 24VDC K8444269A-04 782979112785