Rated 5 out of 5 stars

Love this addon.
Before discovering it. I was using a Greasemonkey script for youtube, aswell as Customize your web, Remove it Permanently and Colour That Site! to achieve a peaceful darkness while watching videos online.
It was not only time consuming, but also hard to invert a webpage palette, while maintaining its aesthetic integrity. Using CTS! would almost invariably ruin the webpage (hence the other two addons). But at least i could get rid of that awful brightness around the video.
With Turn Off The Lights that hassle is over! Thanks a million for developing this!
Awarded a sixth star for an excelent costumer support!
(There's a Report Issue button inside the addon options, with almost instant answering. Haven't seen such competence in a long time using Firefox with over 50 addons installed!)

@ShowTimeToursSucks: Exhaust your options before complaining publicly, or you'll only make yourself look bad. Report the issue and if all else fails wait for an update. There's plenty of people happy with this addon and i imagine a lot of unpaid work and thankless dedication went into developing it.
Reviewing this addon as stupid and useless is itself useless and stupid.

This review is for a previous version of the add-on ( 

I always support my users! So found a bug or got feedback. Just report to that link :-)