ELN-60-48D common output ground

[mrmp17]

Hi!

I'm putting together a circuit that includes two ELN-60-48D led drivers and two high-power leds. There aren't many wires going to where the leds are and it would be great if I could connect the output grounds from each driver together and have only three wires going to leds; two positives and one common ground. But is this safe to do, since drivers are constant current sources?