I had Dinottes for a while. They're nice enough and not really overpriced given the rest of the market. However I eventually went to cheaper/brighter lights (MagicShine). I had low end Dinottes and really for me the MagicShine has been more reliable than the Dinotte - the Dinotte I had was the 4AA cell one and the battery packs corroded badly, leaving me reaching for my cheap flashlight backup on multiple occasions.

The MagicShine that I have is quite old and I had to fiddle with it a bit over the years, mainly just replacing frayed wires, and I'm on my 2nd battery pack now. I've used it 3 years and it's still working every day for me.

These days they've worked out most of the issues, especially with the battery pack. The 808 is a great starter light for $70.

Check here:
http://www.action-led-lights.com/collections/bike

Alternatively, for < $30 you can go the flashlight route, which I think would surprise you with how bright modern LED flashlights are.

Here's an old post I did on that. The prices are actually lower now.
http://www.bikeforums.net/showthread...=#post14043976

Delivery time from that source is QUITE long, 3 or 4 weeks, maybe even longer if stuff gets back ordered. Alternatively you can try a domestic supplier like ShiningBeam which is reported to have higher quality stuff anyway.