FAQ

1.  What model number naming rule does LIFUD follow?

Take the model number LF-GDE042YF1000U as an example, LIFUD model number starts with “LF-“, it indicate Ledfriend or LIFUD brand.  And the third letter means isolated of non-isolated design, “G” indicates isolated design, and “F” indicates non-isolated design, most of LIFUD LED drivers are of isolated design.

All dimmable LED drivers are started with “LF-GDExxx” while DALI LED drivers all have a (S) in the middle part of the model number.  For example, the LF-GDE042YF1000U is a 0-10V, PWM and resistor dimmable LED drivers and the LF-GDE042YF(S)1000U is a DALI LED driver.  And the “042” means this driver’s max output power can be 42W, “1000” means the output current of this driver is 1000mA.  The last letter “U” means this driver has universal AC input voltage range AC100-277V, and the LED drivers of rated input voltage AC220-240V is ended with H (e.g. LF-GIR040YI1000H).

And all LED drivers of metal case are started with “LF-GM”, here M indicates metal material, like the UL panel light driver LF-GMD055YB1200U.  For more details about LIFUD naming rule, you may refer to page 9 of LIFUD brochure.

2.  Where can we find your UL certificate?

LIFUD UL file number is E338140, customers can click the link http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm and input LIFUD UL file number to confirm the certification of the relevant model number.  And all UL certification does not have a certificate, there is only a notification sent from UL lab when a driver finishes the certification.

3.  Why Lifud most UL compliant LED drivers are printed with the mark  instead of  ?

Mostly LIFUD applies the UL8750 certification and the LED driver is regarded as a part instead of a finished product.  However, we also apply the LIFUD third generation UL panel light drivers LF-GMRxxxYB series and LF-GMDxxxYB series as finished products.  Thus both series pass the TL UL certification (driver as a part) and class P UL certification (driver as a finished product) simultaneously, and both marks can be available depending on customers’ specific requirement.

4.  What is the benefit of flicker-free LED drivers? And what special feature do LIFUD flicker-free LED drivers have?

5.  There is a “NC” mark at the AC terminal of LIFUD LED drivers, what does it indicate for?

6.  Sometimes the electricians need to install 2 or 3 cables inside the screw terminals, but the screw terminal hole looks very small, can LIFUD change the screw terminal to have a hole as big as 5mm?

7.  Why the PSE certificates do not have specific model numbers?

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