I think it matters most where you mount them. I don't have a Tikit, but I'm sure that you can find some good spots. If it's got a rear rack, you can probably tuck a rack-mounted light within the rack so that it won't hit the ground. If not that, then maybe somewhere on the left chainstay (or would the right side be better?) or on the seat mast. A front light would be easier as long as you choose one with a handlebar mount.

Use plenty of wiring and properly-placed zip ties and you should be good to go.

If I get myself a Tikit, I'll make a real attempt at my own setup.