You need to be more precise, I think. I think the only fair way to compare it is with your chances of being struck by lightening while waiting for lottery win, so 7 days - they draw the lottery every week, right?
Chances of winning national lottery is 1/14 million (thank you google). Chances of being struck by lightening ....
30-60 struck per year in the UK (again, google), so let's say that's a 60/66 Million chance of being struck by lightening in a year, or roughly 1/66 million chance of being struck while waiting for your number to come up. So, no.
Let's see, if you wanted to have an equal chance of being struck by lightening or winning the lottery you'd need to buy a ticket about every month.