What does 밝기 낮음 look like on HTC?

On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.

When did HTC add 밝기 낮음?

HTC first drew 밝기 낮음 in Sense 7, released 2015년 3월 30일.

HTC Corporation has shipped 2 versions of 밝기 낮음. Each is dated, so you can see when the design changed.

HTC

HTC Corporation has drawn 밝기 낮음 2 times. Every revision HTC has shipped is below, newest first.

What does 밝기 낮음 look like on HTC?: On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.
When did HTC add 밝기 낮음?: HTC first drew 밝기 낮음 in Sense 7, released 2015년 3월 30일.
How many times has HTC redrawn 밝기 낮음?: HTC Corporation has shipped 2 versions of 밝기 낮음. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.