To answer your question here, while not a bike specific light, the fenix flashlight and fishblock bar and helmet holders will meet most cyclists' needs. Do a search and read about it.
https://www.4sevens.com/index.php?cPath=25_66
https://www.4sevens.com/product_info...roducts_id=362
A retired buddy of mine had budgeted $400 to replace his ancient lights. He purchased two fenix flashlights and twofish holders and could not be happier. He paid around $150 plus you would have to purchase batteries and a charger if you do not have them, which we both already had.
If I could only have one light, it would be a helmet mounted fenix flashlight which would be within an $85 budget not including batteries and a charger. For a Lacrosse charger and batteries total cost would be $110 to $120. I found amazon.com had the best price on the LaCrosse BC-900 charger and got Duracell 2650 nimh batteries at Target.
I personally have the Vega and the Princeton Tec SW3 and one Fenix flashlight that I use. If I had it to do over again I would purchase 2 Fenix flashlight and holders or I would get the Dinotte Li-ion bar/helmet combination with tailight for $429.