Watts, Volts, and stuff... LED Tube Lights...
 

I am a bit lost and thought one of you may be able to help. I am looking to build a light bank of LED Tube Lights, that are compatible with T8 fluorescent lights, using the G13 bi-pin connector.

Can I run these LED lights right into the wall? No stepping down to another voltage?

http://www.ledmann.com/24W-T8-LED-Tube-285.html

What do the watts mean? Power consumption? The more the brighter?

Yes, WATTS are the dynamic resistance of a load(bulb)... You will probably need some sort of transformer to step down the current for LED lighting. They run on very low voltage and have almost zero resistance.

Ah thinks. What's this... Working voltage：AC100-240V how do I know what it needs to be stepped down to?

It means that they're designed to be used with 110/220v light fixtures. You don't need a step-down transformer or anything, just make sure the fluorescent fixture you're using is compatible with the lamps and bypass the ballast, i.e., connect your feed straight to the socket.

It must have a built in transformer... 110 is standard American A/C current... 220 is for high voltage appliances(stove, a/c, washing machines)...I think most European electrical current is always 220(could be wrong abou that tho)