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Why brightness would affect the color temperature of led light panel

Why brightness would affect the color temperature of led light panel

Custom LED Light panel with dimmer

Custom LED Light panel with dimmer

Lets make a test:

Material:    (1) 2 pcs very slim custom led light panel (They use same size,same led with same color temperature,5000 K)

                    (2) LED dimmer

                    (3)Digital measuring meter ( Color temperature and brightness)

Test data: 

Slim led light panel in normal status Brightness:12000 Lux LED color temperature:4920 K
Slim led light panel reduce brightness by dimmer Brightness:3298  Lux LED color temperature:4460 K
test color temperature of led light panel by Digital measuring meter

Test color temperature of led light panel by Digital measuring meter

Question:Why the color temperature of led light panel would be different in different brightness?

Answer:We could make assumption.The led color temperature seems like the fireplace.The power and color temperature is fixed.And the acrylic panel seems like the room.When the room is small,the average heat would be high.The average heat would be reduce when the room is large.Same as LED color temperature,when the light panel is slim,the average led color temperature would be high,similar the data you test directly form the led lamps.When we add the dimmer,try to reduce the brightness,it seems like change the large size acrylic panel,then the led color temperature reduce together with the brightness.

Note: 1.The LED color temperature of led light panel affect by much factor.The reflective paper on backsides,the brightness of surrounding.

In order to make sure the test data,we choice the same led light panel,the same led in same place,same time.

2.The digital measuring meter with a certain amount of error (about 300 K,200 Lux )

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