And also...
It's also worth examining what lighting is the most effective for enabling effective evacuations during darkness. Part of this consideration will be the lighting level just prior to initiating an evacuation. It's standard with most airlines to turn the engines and APU off prior to evacuation, thus removing power to the busses that power normal cabin lighting. This in turn normally turns on the emergency lighting systems. And while we are here, does an evacuation alarm work? What is its precise function?
Just a little extra to matelo's post - with a bloody great fire at Okinawa, a "First World" airport, it took at least 4 mins 40 seconds for the first fire fighting measures to be taken. At Glasgow, the boys (& girls?) with the blue lights observed the evacuation.