Opinions on these chinese LEDs

[bluesox68]

I have been advised that these aren't the best but I can't afford the best. I have read so many mixed reviews and I don't really understand LED's and brightness and par and all that stuff. All I know is I want a 3 watt, with a nice blue colour. Can someone please tell me the difference between these 2 and what you would go with, or if you know a better brand without a huge price jump? It would be tucked in a wooden canopy with fans
over a 40 tall

http://www.aliexpress.com/store/3178...-25-white.html

http://www.aquatraders.com/EVO-24-LE...ht-p/56232.htm

I do want to be educated with these so pros and cons welcome