Well Im new here and want to chime in with my .02 cents 
Some time ago I purchased the TK40 and I was really happy with the light. It had/has incredible throw and a moderate amount of flood.
Then I start reading about this HD2010 light and for $30 bucks why not give it a try. DANG! the HD2010 is legit. Its beam is more focused then then the TK40, but doesn’t quite have the flood the TK does. Plus the HD2010 uses one 18650 battery instead of 8 AAA.
So, cruising for a bruising Im reading about this Costco HP550. I figure Im gonna check out my Costco and see if its available.
BAM!!! for $50 bucks Im gonna see what all the hype is about.
The Coast Costco light is pretty sweet. From my view it has great throw and with a cool sliding front end used to focus or widen the beam.
The HD2010 and the Coast HP550 are not the TK40, but theyre 90% the light for a lot less money.
