LED Lighting Manufacturing Quality Checks

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Jim Wynne

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#2
Re: LED lighting Quality Checks

The quality checks are dependent on the specifications and the manufacturer's risk assessment. If you could give us more information about your specific concerns we can give better advice.
 
M

MIREGMGR

#3
Re: LED lighting Quality Checks

LED lighting has a non-flat color spectrum...white LED lighting is created by combining multiple nearly-monochromatic (narrow wavelength-bandwidth) chips. This might or might not be relevant. (Of course, fluorescent tube phosphor coatings also can have non-flat color spectrums.)

Sometimes the differing color-chips have different emission directionalities. This can result in odd color shifts off-axis from the light fixture.

Many LED lighting products take advantage of eye persistance, and pulse the chips with high current with a noncontinuous duty cycle. This generates more apparent brightness for a given chipset thermal dissipation. It however also creates some degree of strobe effect on fast moving objects. In my experience at home where I've recently installed a lot of LED lighting, this strobe effect is much more pronounced for some LED systems than for typical linear-tube fluorescent systems.

Some LED light strips that might be considered to replace fluorescent-tube fixtures have multiple LED chipsets at non-coincident locations. Because there are significant spaces between the chipsets, the light from such LED strips behaves as if it's coming from many point sources, instead of from a continuous line. When DUT reflection is a consideration, this difference in the specularity behavior of the light can be significant.
 
#4
Re: LED lighting Quality Checks

The quality checks are dependent on the specifications and the manufacturer's risk assessment. If you could give us more information about your specific concerns we can give better advice.
I have been placed in a possition as a Quality Manager to monitor and insure the quality of outgoing LED type lights. I have no experiance in this feild and was wondering what are so of the common areas that are controlled in the process of manufacturing LED lights.
 
M

MIREGMGR

#5
Heh, sorry, I totally misunderstood the original post...I thought the question had to do with using LED lighting for visual inspection. My apologies for diverting the thread.
 
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