A friend of mine has an extra 2.2k 4w resistor, he says it will work like the 2.2ohm 5W Tim sells. I was curious if he was right? Also is 2.2 K the same as 2.2 ohm? I have a Green luxeon III and a 9v power supply. I know this is probly a major noob question so feel free to flame away. Thanks in advance for any help