photometric lightning 60 watts problem

when i create a 60 watts generic bulb and put it to my scene that is in inches
in the system unit scale (1 unit =1 inch) the result is very dark in the
viewport. I have created a cylinder 8 inch tall and a plane and put my 60 watts
bulb about 6 feet over it in angle. I imagine a 60 watts illuminating more than
that in real life. Even my a create a radiosity solution to logarithmic with a
physical scale equal to the candela used i have a dark scene....
to have a good visual lightning i must raise the multiplier up to 896
candelas...
is this normal than a 60 watts bulb does not illuminating in the viewport?
 anyone has got problems like this one?

thank you