This project looks into utilizing a familiar LED Light panel technology along with a one way 'magic' mirror. This technology was deployed in a decorative lighting product that catered to the design sensibilities of the target Indian market. The final product was a mirror when switched off and a glowing light panel when turned on.


  1. Agrim Chandra ( Interaction Designer )
  2. Parv Rustogi ( Interaction Designer )


  • Product Design
  • Visual & Interface Design


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We were successfully able to reverse-engineer a light panel and derived the components that needed to be used. Here is a list of the components -

  • Mirror - The mirror used is a one way mirror that reflects light partially and allows the rest to come through. It is able to be successfully used as a mirror when there is not lit, and is a translucent glass piece allowing light to pass through when needed.
  • Diffuser - This plate allows the light to be diffused more evenly and thoroughly.
  • Light guide plate - The LED strip is stuck inwards at the edges of this plate. The texture of the material forces the light to spread out evenly throughout the panel.
  • Reflector -   The reflector reflects any waste light bleeding out back and pushed it back towards the top.


A total of 8 different settings for the LED panel were tested. Variations were in terms of LED Strip color temperature ( 2700K Warm White, 3000K Medium White, 4000K Cool White) and 4 different qualities of mirrors used with different reflective properties and base glass colors. Our final testing showed the best mirror setting to be with a black mirror and warm (2700K) LED Strip light.


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This technology was supposed to be used in a




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The final product design would have be a marble frame within which the LED panel and mirror would be placed.  The marble would be engraved with motifs acting as touch sensitive buttons. The product would be wall mounted using a single bolt at the top and a french cleat system at the bottom.


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The initial function of the product included 3 key specifications -

  1. Choosing the brightness/dimness of the light

  2. Choosing different color gradients to be shown

  3. Choosing the light color temperature being emitted

From the three possible options that could be included, for our final prototype, we excluded the 3rd point. According to user testing, there was not a big enough gap range of preferred color temperature to warrant this additional functionality. Most people preferred the light's temperature between 2700K and 3000K. For our final prototype, we decided to keep the light at a 2900K constant color.


To test the maximum thickness under which the capacitve sensor, I tested it under various different thicknesses of wood. For wood, the capacitive sensor worked best with 5 mm of distance between the touch point and the sensor.

  20 mm

20 mm

  15 mm

15 mm

  5 mm

5 mm

The final chosen interface has some key points -

  • To denote brightness, the central circle on the left hand side show a gradient of white (top) to back (bottom).

  • To denote the different color gradients possible, the inner petals of the flowers on the right match the central color of their respective gradients.

  • Individual capacitive buttons were used instead of a single capacitive scrolling strip. This was done to reduce the amount of options present for the user, allowing for easier choices. Single touch buttons would also limit the area the user touches the marble piece with potentially unclean hands.

This project is still under development. Slated to complete by Q1 of 2018.  The collection is to include a marble wall light and a wooden wall light.