My Mini Maglite works great.  For as little time as we spend at night in icing conditions, installing wing lights seems like a lot of effort.  Simply shining a flashlight out the window works every time.

The one suggestion I have is when considering a paint scheme to put some dark paint somewhere along your leading edge or you won't see a lot of the ice.  I've run into ice once in my ES during a descent that ran into a rapidly descending overcast from above me.  If I didn't have some dark blue paint out near the end of my wings, I couldn't have seen it.  By detecting it early, I was able to reverse course and get rid of it quickly, then continue my descent in the clear.

Skip Slater
N540ES