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The Science Behind HALAR
There are 4 reasons why a flashing Red/Green light is more effective than a strobing white light:
1
The eye is most sensitive to Green light. Under daylight conditions, the human eye is most sensitive at 555nm. At night, it shifts toward 507nm (greenish-blue).
2
Exposing the eye to different colors interferes with depth perception, similar to how 3D glasses create visual separation.
3
Flashing colors interfere with the brain’s perception of objects, slowing reaction time.
4
The frequency of flashing light plays a major role. The right frequency increases disorientation more effectively than steady light.
Halar Eye Safety
Our review of eye-safety standards, LED manufacturer certifications, and internal measurements have concluded that:
(A) The red and green LED illumination used in the HALAR Tac Light is classified as Risk Group 0 (Exempt) or Risk Group 1 (Low Risk) under IEC 62471: Photobiological Safety of Lamps and Lamp Systems.
These classifications indicate no photobiological hazard under normal behavioral limitations and confirm that the HALAR Tac Light meets established international eye-safety exposure criteria.
(B) The alternating Red / Green LED illumination (“HALAR Mode”) provides a more eye-safe alternative to strobing white light by eliminating blue light emission - the wavelength range most associated with potential photochemical retinal hazards and requiring control under eye-safety standards.
(C) The subject’s natural physiological response to HALAR Mode illumination is to blink, close the eyes, or avert gaze. These involuntary reflex actions occur automatically and serve as effective protective mechanisms that limit exposure duration and reduce the likelihood of ocular discomfort or photobiological risk.
Accordingly, no specific safety controls or protective measures are necessary during standard operation of the HALAR Tac-1 Light, provided it is used in accordance with manufacturer guidelines and intended operating conditions.