The problem here is if you don't know what you're buying - you literally won't know what you're buying.

On paper this might sound very technical and professional: http://www.amazon.com/gp/aw/d/B005OJWBO0
But too much is just flat out BOGUS marketing.

The description reads
'New SSC-P7 3 Mode 1200 Lumen Cree LED Bike Light Set '

The details list the following specifications (among other things):
'Emitter BIN: SSC-P7'
'Brightness: 900~1200 lumens maximum brightness (manufacturer rated)'

Problem is SSC-P7 isn't a BIN designation. SSC is the abbreviation for Seoul Semiconductor Co., Ltd and P7 is a type of LED which itself has several different BIN designations, NONE of which ever had a rating of over 900 lumens by the manufacturer (SSC).

Further confusing the issue is the inclusion of Cree LED in the description. Cree and Seoul Semiconductor Co., Ltd are in fact, both competitors in the LED market.

But there you go - to the uninitiated - there are some recognizable names and impressive numbers and a description designed to pull the wool over your eyes and take your money.

Yeah - you'll probably get a light. It just won't be anything like what was described, but may look similar to the photo - if you're lucky.

Suggest you buy from a recognized source - preferably someplace where you can actually see what you're buying ahead of time. Be prepared to spend more than $50 for something actually useful.