need help on first try on web lights

hi,, ever since i had autocad 09 ive always use the sun and sky for illuminations in exteriors and interiors....

now i have tried photometric light for the first time and can't get it right.... if someone out there who knows i'd be glad,

my question is how to illuminate this scence right.

and where do i put my lights (i main the z value location of lights)

and what kind of ies. file should i use?

in this scence i have use point.stadium.

when i use few photometric lights and added a couple of point light with shadows off to brighten up the scence i always get the bright point spots of point light in some surfaces. how to i delete this spots..... the loccation of point light off shadows are in the middle of total elevation.....

here is the file. hope someone can help me with this.

just click the link and download the file lights http://www.savefile.com/projects/808773788

i have save the dwg file coz it file size is 3mb.