Reddit mentions of CowboyStudio Ultra High Power Dimmable 160 LED Video Light Panel and NP-FM50 Rechargable Battery Pack with Cold Shoe Mount for DSLR and Camcorders

I have done weddings in the past, but I don't really do that anymore. As far as lenses I have a 85mm 1.4, a 50mm 1.8 and an 18-135mm zoom 3.5. I have never had an issue with low light on my 1.4. as far as a response to the using prime lenses, I would say the point when shooting a reception is to get up close on people, so a zoom is unnecessary. The only time i could think a zoom lens is good is for the actual wedding when you have to by way in the back. Anyway if your going for a nightclub effect kinda deal, then the light is absolutely necessary. I wouldn't focus to much on brand names when it comes to those lights. Get yourself a nice small LED light. most of them have an adjustment knob, and are small and compact. You usually have 2 options, these are the ones that feed off the camera battery via the hot shoe, and those that use their own batteries. If you plan on using it a lot, get one with a rechargeable battery pack, unless your cool with changing out AA every few hours. This is a good one
http://www.bhphotovideo.com/bnh/controller/home?O=&sku=743442&Q=&is=REG&A=details

OR

http://www.buy.com/pr/product.aspx?sku=227726324&sellerid=19087894

or

my favorite

http://www.amazon.com/dp/B004W4EQVY/ref=asc_df_B004W4EQVY1972205?smid=ATVPDKIKX0DER&tag=hyprod-20&linkCode=asn&creative=395093&creativeASIN=B004W4EQVY&hvpos=1o1&hvexid=&hvnetw=g&hvrand=16538700381183150173&hvpone=&hvptwo=&hvqmt=