Information

ANSI/NEMA FL-1 standard
.The descriptions of test contents and icons
4.Peak Beam Intensity:
 Peak beam intensity is the maximum luminous intensity typically along the
central axis of a cone of light. The value is reported in candela and does not change
with distance.
 Purpose:
To provide a procedure to determine the peak beam intensity, reported in units of
candela, of the device’s beam pattern within 30s to 2 min of operation.
Procedure:
Place the luxmeter at a test distance of either 2 or 10 or 30 meters from the lens of
the device to be tested. Use the luxmeter to identify the brightest point of the beam
pattern and record the highest indicated value. Results are reported in candela.
Measurements shall be taken 30s to 2 min of turning on the device.
Final Calculations:
Surface light intensity (lux) x distance (m)2 = peak beam intensity (cd)