For comparision with the bizarre incandescent spectrum http://twitpic.com/1p71xp here's one of the fluorescent lamps lighting the Bonn University lecture hall (HS X) where the experiment took place, obtained with exactly the same detector - this line spectrum matches expectations, I'd say.

For comparision with the bizarre incandescent spectrum http://twitpic.com/1p71xp here's one of the fluorescent lamps lighting the Bonn University lecture hall (HS X) where the experiment took place, obtained with exactly the same detector - this line spectrum matches expectations, I'd say.