During my recent workshop in Iceland, I found that lightpainting would be challenging because it never gets dark at this time of year! Luckily, we got an overcast evening and I was able to get away with much shorter shutter speeds because the flying sparks were so darn bright! The sparks were created by burning steel wool, swinging around in a circular fashion. This was shot around 2 am and the workshop group had a blast!
We're planning another Focus on Nature Iceland workshop in the winter of 2013, which would include light painting, ice caves and hopefully some northern lights!