Redstone/Light updates causes lag neighbouring chunks. (Check video)

To reproduce:
Build a high speed clock 2 tick clock in 1 chunk and observe the next chunks.

http://youtu.be/kXqOU1N5G0w

I had to take the video with my phone, as fraps seemed to make the issue go away.

17.7.2014 Minecraft extreme lag testing. 14w29b VBOs:OFF

With VBOs:off I get this on the next chunk.
With VBOs:on it is gone, but my FPS is lover.

When I tried to record in on fraps it stopped doing the lag.