Light color :White
Spot diameter :1.50″ (38.1 mm)
Light output :44 lm
Inside diameter :1.925″ (48.9 mm)
Outside diameter :3.50″ (88.9 mm)
Power dissipation :3 W
Max. current :200 mA at 14.5 VDC
Max. voltage :16 VDC

Model RL40 :: Compact high-intensity ring light

Please note that this is a legacy product. We recommend Model RL16 for new designs.


  • Outlasts fluorescent ring lamps
  • Less than 3 W power dissipation
  • Low cost
  • Compact size
  • High light intensity
  • Includes brightness control
  • Available with flush mount


Orled's RL40 is a low-cost ring illuminator for inspection microscopes. It provides 360 degrees of illumination, eliminating shadows while using under three watts of power. Our ring lights typically outlast fluorescent lights by a factor of five, yet are equivalent in performance and comparable in cost.


The RL40 is supplied with set screws for connection to microscopes.

Input power

The ring light requires 200 mA at 14.5 volts DC, which is supplied via the included AC adaptor and brightness control. The brightness controller limits the applied voltage to 14.5 VDC.


Model Description Price Order Qty.
1 2–9
Ring Lights
RL40 Model RL40 $330 $291