Save the Daylight!

In honour of Daylight Savings today, I'd like to find out who can save the most. Beginning this morning, save as much daylight as you possibly can. Whoever succeeds in saving the most daylight will win. The rules are simple: Only pure daylight will be counted, no dawn, dusk or twilight will be counted. However, overcast light filtered through clouds will be accepted. Moonlight is strictly forbidden, and will be met with disqualification. Light can be stored in any container.

Please send me quantifiable pictures by the end of the week, to be judged. Good luck and happy savings!