I am lucky to have a TH20 with a clip. Also have a SP40 with a clip. At the moment the SP40 is in its headband. The last few nights I have been using the TH20 clipped to my coat and it works great! Could use the SP40 this way as well. On my coat I am able to clip the light horizontally so it is easy to adjust the height up and down. This would work for either light.
Here are some pics of how I have used the TH20 for hands free use. Any right angle light with a clip like the SP40 would likely work well for this.