Safety Bike Tail Light with Directional Signals
All this is very much depends on how good you are as a salesman. Very good salesman can sell sand in a desert and make good living. 

I'm not sure what market you are talking about, but in UK you can get very different price range for the lights, top models priced at £144 ($227). And I have seen these lights used on the streets.

So $90 makes it costly for most of the people, but certainly you would find your customers who would want the set of features you are talking about.