Very interesting - I was about to purchase a Magic Shine - and I already own both Stella and Dinotte - whew!
Again this goes back to an "led" war - where "lumen count" means everything.
Bottom line - there are professional - fail safe lighting systems designed for consumers, and of course "peformance driven" competitive designs.
Just one-time more - just for effect - UNDERSTAND, YOUR OWN USEAGE - dictates the priorites associated with any bicycle component.
Get a grip.