Not really
Except it doesn't really save 17% does it?
Some of the time it's on for a reason, and lets face it most of the time people turn the lights off when they go to bed - lets assume therefore that it's on a more realistic 17:00 - 23:00 every day of the year (possibly longer in winter, especially at weekends, and less in summer) - that takes you to the equivalent of leaving a 10 watt bulb on all day giving you a much more realistic total of 3%.
But then again you can't buy "normal" light bulbs in most retailers any-more, so it's probably an 11watt CFC bulb, so 1.84watts an hour equivalent which about 0.5% of the annual total - some of which it's probably being useful.
Assuming this is in somewhere like a lounge where you might be in for 3.5 hours of the evening turning it off for the thirty minutes you are out the room would save you about 0.1% of your average total - i.e. 1.8kWh, or running that 2kw fan heater just under an hour to heat your room up in winter because it's a bit parky.
According to EDF that is 21p here in the East Midlands - I dare say that saving is completely erased by having to buy a new bulb prematurely as the constant power cycling has caused it to fail - and I imagine the energy used in producing it is more than the energy I as an individual have saved.
And this is what the article set out to prove!