DIVA Grasshopper light material returning an error

Hi,

I was running a simulation with a light material and I get a "Null" illuminance output. I am pretty sure it's the lighting material I add to the material file... I basically applied it to a cylindrical shape as: 

void light light_bulb
0
0
3 128 128 128

Is the lighting material not supported by the DIVA grasshopper or am I doing something wrong??

Thanks in advance!
Dalia.