Wow!
From the AAIB Special Report, it appears that the Light Sets used for filming the plane on the previous day each had a power rating of up to 12KW. That must be a lot of Infrared!
Here is their photo:
And the units are named as: "Maxibrute 12".
Hmmmm........
And it seems that they cooked the rubber seals around many windows, causing 2 window assemblies to depart completely and several others to show damage.
The steel window retaining frame was undamaged as seen here:
An amazing incident, but fortunately not one likely to recur very often, I think.
IB