Jun 10, 2020
LED Strip Light-Frequently Asked Questions
The TM-21 standard picks up where LM-80 left off. Since LED sources are capable of lifetimes well beyond 6,000 hours, TM-21
establishes a standard way to use LM-80 data to make consistent lifetime projections beyond the testing period. TM-21 dictates
which values can be used in the calculation based on the sample size, number of hours and intervals tested, and test suite temperature.
What is L90B10@10,000hours?
L defines the percentage of lumen comparing with the initial lumens, B value means the failure data at the L data. So LB value
indicate the real lifetime at a certain hours.
How small bin can we supply?
1 Bin will be the smallest we can source, but normally there will be 2-3 bins used inside the products if there is no specified.
How small mac adam ellipse can we supply?
The minimum we are doing inside the company was 2.5 steps, standard price in the pricelist was around 4-5 steps, economic
type will be at 6 steps.
How small color temperature ranges can we supply?
What is the difference between PU and silicone glue?
A) Cold and high temperature resistance PU(polyurethane) has a good low temperature resistance, but not resistant to
high temperature;while silicone glue with good heat resistance and good low temperature resistance.
B) UV resistance In the presence of UV light, an organic material(Polyurethane) will eventually revert to it's natural state,
thus changing properties and deteriorating over time, an inorganic(silicone) will not.
C) Yellow degeneration The PU glue has a little yellow degeneration as time goes, while silicone glue has no yellow degeneration.
D) Lifespan,Chemically, the organic material(polyurethane) will bread down when expose to high temperature or UV,
so the lifetime is shorter than silicone glue.
How is heat shrink pipe works in led strips?
Working condition at -55 to 125 degree, 3 minutes shrinking at 200 degree according to UL224 standard. Color at Transparent with options at Black,Red, Blue, Yellow at customization. Heat shrink Pipe was made of PET, Anti-Electric below 600V, Anti-Fire Ratio at VW-1.
What is CCT shifting and how to control it?
All of the color temperature will be shift by any cover in front of the LEDs,different Glue will have different influence on the whole temperature of LED strips, the shifting curve can be referred by detailed.
What is the max width of the PCB for heat shrink pipe?
When using heat shrink pipe on the led strips, the max width is 13.5mm.For 15mm or above, the pipe make the led strips out of shape.