Subject: spiked appearance of bright light source

i am sending the question again to clarify my question.

the spiked appearance of bright light source, i mean why there is some 
rays liked structure come from the light bulb of the street lamp?

i would also liked to know the causes of the spiked appearance of the 
bright light source.

i hope i can make what i ask clear.

if anything that is not clear enought, please send an email to me 
again.

thank you for your attention and sorry for the inconvenience.

Re: spiked appearance of bright light source