LED driver does not give constant current with a load
The minimum voltage drop across the device is 2.5 V. Add in a couple of green LEDs and you've got a minimum voltage drop of 2.5 + 2 × 2.2 = 6.9 V.
If your supply is, say, 12 V then the maximum cable voltage drop is 12 - 6.9 = 5.1 V giving a maximum resistance of V/I = 5.1/10m = 510 Ω. At 100 Ω/mm that would give you a max of 5 mm of conductor before you're in trouble.
You can recalculate for your supply voltage.