GU10

 4.3 retinal thermal hazard analysis

LED Downlight

Standards: to prevent thermal damage to the retina , non-hazardous radiation exposure lamp at time t does not exceed 10 s case , light weighted radiance thermal hazards should not exceed limits:

Measured in the experimental chord angle α = 0. 041 rad, t = 10s into the above equation , obtained limit requirements : 28000 / α = 28000/0. 041 = 682926W • m - 2 • sr - 1.

LED Strip 

The experimentally measured value is 5. 91 × 103W • m - 2 • sr - 1, less than the standard limit , so that the lamp without retinal thermal hazard .

    4.4 retinal thermal hazard radiation exposure limits - for the faint visual stimulus Hazard Analysis

Standards: for an infrared heat source or any near infrared light, when the irradiation time with the eye , and when more than 10s , the near -infrared (780nm ~ 1400nm) should be limited to the radiance :

  GU10 

The α = 0. 041rad into the formula , we can see near-infrared radiance limit of 146341W • m - 2 • sr - 1. The experimentally measured value is 0. 836W • m - 2 • sr - 1, far below the standard limit , so comply with the project requirements for non-hazardous lamps .

4.5 Eye infrared radiation hazard analysis