On Wednesday, December 14, 2016 at 9:36:49 AM UTC+13, Steve L wrote:

I fly Experimental so the bike light idea appeals to me along with the fact there is no wiring and the price is nice too. Any recommendations on which is the best and which one has the strobe effect?

Almost all bike lights will flash like a strobe. Price/performance is improving rapidly.

A lot of bright LED flashlights also have a strobe effect and some have a focusing lens to vary the beam angle. The flashlights has a small frontal area for minimal drag and some are waterproof.

http://www.besttacticalflashlights.net/best-flashlight/

The tricky bit is aiming it, being 'bright enough' and getting something that looks 'not improvised'.