xflux requires post code, or latitude... How can I have flux activated all the time?

I am running Debian. The only way I have been able to use flux is via the command line interface software "xflux".

All seems to work fine, however, xflux requires I specify a latitude, or a postcode. There is no option (as far as I can tell) to set flux "always" on... I much prefer it always on for my eyes.

Here is an output from xflux:

Welcome to xflux (f.lux for X) This will only work if you're running X on console. Usage: xflux [-z zipcode | -l latitude] [-g longitude] [-k colortemp (default 3400)] [-r 1 (use randr)] [-nofork] protip: Say where you are (use -z or -l).

I enter "xflux -k 3000": Nothing Happens...

I enter "xflux -k 3000 -l 1":

Welcome to xflux (f.lux for X) This will only work if you're running X on console. Guessing your longitude is 0.0 based on your timezone Specify it with -g to make things better. Found 1 screen. Your location (lat, long) is 1.0, 0.0 Your night-time color temperature is 3000 Going to background: 'kill 1795' to turn off.

So as you can see, ONLY when I enter a -l or -z argument, xflux starts. I can't just start flux permanently at a specific setting.

If anyone can help me I'd much appreciate it!

Thank you,

Eillo