Controlling 2-4 LED's

Would this RFP30N06LE MOSFET work for turning 2-4 LED's in series or parallel on/off with 1 pin?

http://www.sparkfun.com/products/10213

Definitely - and they could be powerful LEDs too if you want (1, 3, 5W luxeons or similar). You will need current-limiting resistors and an appropriate power supply naturally.

and they could be powerful LEDs too if you want and they could be powerful LEDs too if you want

I wouldn’t use resistors on high power LEDs, you need constant current drivers to make it safe and reliable.

Grumpy_Mike: I wouldn't use resistors on high power LEDs, you need constant current drivers to make it safe and reliable.

??? You can't just use resistors to drop 12 volts or 5 volts down to the proper voltage for high power LED's. 'Constant current drivers?' Is there some good reading you'd recommend to better understand this? I'm wanting 1-4 LED's to kind of light up an area under a cabinet. Not sure how big of LED's I need. There's 'super bright' LED's, but I don't think they really use that much current. Does anyone have any good info on this topic?

ps. would something like this not work with just some resistors... http://cgi.ebay.com/2-Super-Bright-LED-Touch-Light-Set-Under-Cabinet-Closet-/390297205315?pt=LH_DefaultDomain_0&hash=item5adf86ba43#ht_2106wt_1139

Here are some old discussions on high power LEDs http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1234273497 http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1258412419

There are also some good links off those threads.

I guess I won't really need the high power LEDs. Here's what I plan to use: http://cgi.ebay.com/ebaymotors/LED-STRIP-30CM-DRL-DAYTIME-RUNNING-LIGHT-AUDI-BLUE-12V-/130394189542?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e5c196ee6#ht_5317wt_939

...I shouldn't need anything but the RFP30N06LE MOSFET to use this since my power supply is 12 volt and it is made to connect to automotive 12 V.