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LEM Series Compatibility and Suitability of Use Guidelines
Addendum (Rev. A)
This product is suitable for field installation with suitable LED loads including LED luminaires, DC voltage driven LED
replacements for fluorescent lamps and others. There are 4 checks to determine if your luminaire is eligible for field
installation.
1. Ensure the LED load’s rated power is greater than or equal to the power output of this emergency LED driver.
This is to ensure that this emergency product will not produce more power than the LED load can handle, thus
ensuring that the LED load will not be damaged when the system is in the emergency mode.
2. Verify that the forward voltage of the luminaire’s LED array is within the limits of this emergency LED driver. The
forward voltage of the LED array is commonly designated as Vf and should be found on the luminaire markings,
in the luminaire specifications, or imprinted directly on the LED arrays. If multiple LED arrays are to be driven,
verify that the total forward voltage is within the limits of this product. Using a voltage meter, it may be possible
to directly measure the voltage across the LED arrays when operating from the AC driver.
3.
UL Classified Emergency products can be paired with LED luminaires or retrofit kits if found in the Design Lights
Consortium database. Go to the Design Lights Consortium website (http://www.designlights.org) and search for
your LED system by model name or model number. If found in the database, these products are preapproved
by UL to be installed together in the field or at a luminaire manufacturer, provided steps are taken to ensure
there will be sufficient light output in the end application.
4. You can
estimate
the egress lighting illumination levels by doing the following:
a. Find the efficacy of the LED load, which will be found in the Design Lights Consortium database. This number
will be given in lumens per watt (lm/w).
b. Determine the approximate power output of the emergency LED driver. See TABLE A on page 2.
c. Approximate lumens can be calculated by multiplying the output power of the emergency LED driver by the
efficacy of the LED load. This number is only an approximation however it will provide a good estimate for
beginning the lighting design of the system.
5. Determining Adequacy of Means-of-Egress Lighting Levels
6. While this model has been found compliant with the requirements of UL standard 924, it is ultimately the re-
sponsibility of the Designer/Specifier to assure the as-installed system delivers code-compliant path of egress
illumination in accordance with Federal, State or local municipal requirements.
68LEM-000
REV 2000