1. If I am going to connect 39 of these white LED's in parallel how much power do they consump? (0,02A x 39) x 2,6v = 2 watt ?

2. The voltage drop over the current limiting resistor doesn't that also have a power consumption?

3. If I use a 9 volt power source will a 2 watt 320 ohm resistor be the right resistor to use for a current limiting resistor? (I know about the disadvantages in connecting LED's in parallel)

Thanks