My first LED lamp project.. Power supply questions???

Hello there..

I've been wanting to make an LED lamp for my desk for some time now. A few days ago I saw this Lamp and that's very similar to what I want. After reading up on it and I have some understanding on the basics about LED voltage, current, and resistors, but I am still unclear about the power supply and what I need to have so I can just plug it into the wall.

My plan is to use a 3/4 inch aluminum C-channel to mount the LEDs in twos and staggered them. I want about 140 LEDs, 2 in series and then 70 pairs in parallel.

SPECS from http://led.linear1.org/led.wiz

• each 330 ohm resistor dissipates 132 mW
• the wizard says the color code for 330 is orange orange brown
• the wizard thinks 1/4W resistors are fine for your application
• together, all resistors dissipate 9240 mW
• together, the diodes dissipate 8960 mW
• total power dissipated by the array is 18200 mW
• the array draws current of 1400 mA from the source.

I was looking at AC power supplies that would output 12v and handle the 1.4 amp load, but is that all I need? LINK to one of them
Today I read about bridge rectifiers and capacitors to smooth out the flickering of LEDs on AC power. Would I also need this?

Well anyways I am sure there are many ways to power this lamp, but what would be the most stable and easiest and cheapest solution to power this lamp?

Thanks