David P sent me one of these as a sample, and it looks and works great.
There's a small red light in the bottom spongy bit where you grip the pen, and you use the retractor switch to turn the light on and off.
You can use it as a pen without the light on, or you can use it as a pen with the light on.
It would be great for taking observing/imaging notes out by your telescope, as it would light up enough of your page to see while you write, without turning on the light on your headlamp.
If we had enough interest, I'd get a run done with the IceInSpace logo engraved where you see the "Pens Europe" logo on the picture below.
The cost would be approximately $10 each. Vote in the poll with your interest.