Tanks all.
- Components are buy here (sorry but the sites is in italian language

):
1 - Heatsink buy here:
http://www.xled.it/prodotti/accessori/#ar03s --> Dissipatore per led 3-5 Watt
2 - Cree LEd buy here:
http://www.bizetashop.it/shop/10000-...0-r4-xpgwht-r4
Is not possible attach the led directly on the aluminum bar because the profile is too thin and therefore not able to dissipate the heat produced by the LEDs
Ciao Christian