Smart-home device light rings with scalloped transmissive sections for uniform output

A method of assembling a uniform light ring in a smart-home device, the method comprising:

• mounting a plurality of LEDs (light emitting diodes) on a printed circuit board;
• placing a light guide having a cylindrical shape on top of the printed circuit board, wherein the plurality of LEDs are received by a plurality of cutouts in a transparent middle layer of the light guide of the light ring, and wherein the transparent middle layer of the light guide comprises a plurality of transmissive sections that extend away from the plurality of cutouts, wherein the plurality of transmissive sections have scalloped profiles that radiate outward from the plurality of cutouts, such that light from the LEDs is gradually reflected as it travels through the middle layer towards a substantially circular output surface of middle layer.