Birns Doubly-Safe Chamber Light

The Birns Doubly-Safe Chamber Light, Model 4121, meets or exceeds applicable DNV, Lloyd’s, and UL requirements; superior thermal design permits the use of higher-output lamps; and Birns’ exclusive ‘doubly safe’ dual helium release method makes the entire front of the light its own helium release valve.

Comes with frosted diffuser for a softer white light.

Lenses may be ordered clear or frosted. Frosted lenses provide less glare. The standard lamp is 24V/50W which is the brightest available, but the light can be ordered with a 25W lamp at no price differential. The light can be wall or ceiling mounted.


  • Brilliant “white light” illumination

  • Small size (Ø76mm / 3″ OD), mountable almost anywhere

  • Superior heat-sink design

  • Two helium release methods

  • Low-voltage lamps and a case ground (earth) connection make the Chamber Light very safe to use

  • Lamp and lens options to make it perfect for most applications


  • Lamp type: Incandescent Tungsten-halogen MR-16 (Parabolic Aluminized Reflector)

  • Time to full brightness: < 1 second after application of power

  • Operating position: Universal

  • Rated average lifetime: 3,000 hours

  • Dimming range: 0-100%

  • Light output: 895 initial lumens

  • Correlated color temp: 3,050 K

  • Length: 3″ (760 mm)

  • Weight: 1.0 lbs. (450 gm)

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