Hi,
- Drive Voltage:9-12V;Chip Power:10W;Cool White.Color Tempreture:6000-6300K
- Forward Current(IF):900-1050mA ;Lumen:700-850lm;Size:29 x 20mm/1.1 x 0.8 Inch(L*W)
It should be okay with out a limit resistor on 9V
Does the LED light up correctly directy to the 9V supply?
What is the 9V supply?
Don't connect the output of the Arduino directy to the transistor base.
Check your connections, protoboard does not like high continuous currents through it
Tom... 