Wow !
Amazing sighting, Strand. Yes, all the one's I've seen don't change direction which makes me think they are lanterns. They do zip along at quite a speed though. Yours definitely sounds different.
There's an amazing video on orbs on the internet on some mountain I think in the states. At first it shows photos which are not too convincing, but towards the end there is video footage which looks very real. If I can find it, I'll post it.
Maybe you should start an orb thread Strand ? Sounds like the topic is worthy of more discussion and input outside of D&C... I can stick the link on a thread if you start one up.
K
P.S I've just noticed, there are orange orbs in your pic too !