Here's my 2c
I spent 20 years as a smoker. 1 large Bic would last me 6-7 months after lighting 20-30 cigarettes a day. I have had one Bic fail on me, ever, and it had been run over by a car. Mind you it still worked for about a week, then the striker failed.
I have gone swimming for hours with a Bic in my pocket, blew it out and it worked fine.
If you get a white or light colored one you can hold it up to a bright light to see the butane level. However, you will be very hard pressed to run a mini Bic out on a 1 week outting, that is, if all you are doind it lighting fires.
Stay clear from the, um, clear cheepo lighters. I have experienced a very high fail rate with them. The striker mechanism fails easily. Also, on multiple cheap clear lighters the flint has flung out along with the spring upon striking. Don't waste you time with them.
Also stay away from the pizeo style strikers. These are the disposables like the Cricket brand with the push button ignition. They fail easily when wet, dirty, or sandy.
Refillable lighters are expensive and, in my experience, don't provide as many "lights" as a good'ol Bic.