RGB LED makes colors more saturated? I have RGB LED strip that is used as a source of warm white light.
I've noticed that this lighting makes colors of objects more saturated (it's hard to explain, but generally speaking all sorts of things just look much nicer).
When I'm using regular white LED (non RGB) light source of the same color temperature effect is not present. 
It looks to me that it is caused by non-even spectrum of the light emitted - even though it perceived the same as regular white LED by human eye -- reflected light reveals distinct components clearly.
Any references/details for this effect? (is it even real?) 
 A: I just found a research paper describing the reasons of the effect:
https://www.researchgate.net/publication/289684781_LED_light_with_enhanced_color_saturation_and_improved_white_light_perception

In this paper we present the results of light emitting diodes (LEDs)
  with high light quality specially for retail/shop lighting to enhance
  the color appearance of the illuminated products and increase the
  white light visual perception. Four metrics, the GAI combined with the
  CRI are used to classify the color quality, while the Duv combined
  with the CCT are used to characterize the light visual appearance of
  the LED light source. The spectral power distributions (SPDs) were
  optimized by mixing the red, green, blue (RGB) LEDs and the phosphor
  converted warm white (WW) LED together to have both high GAI and high
  CRI to get perceptually noticeable gain in color saturation in one
  side, and optimize the distance from the Planckian locus to improve
  light visual impression in another side. The influences of the LED
  light on the colored clothes and the ambience from a visual point of
  view were tested by a human factor study. The results show that the
  LED light by addition of the RGB components and by shifting color
  coordinate below the blackbody line can both enhance the color
  saturation and increase the white light perception.

An interesting picture, demonstrating the effect as well.

Experimental setup, the left part of the room installed with the CMH
  lamps and the right part of the room installed with the LED lamps with
  eight tunable light scenarios. Mannequins dressed with clothes of six
  different colors for side by side comparison. Illuminance at the
  position of the clothes was set to the same level of about 2000 lx.


