Jesus was not refering to the jewish people as "the light". He was referring to all those there, jews and non jews, who were to be converted and believe on Him later as the light. As for the jews and non jews who dont believe, especially the jews He says this---
John 8:38-45 38 I speak that which I have seen with my Father: and ye do that which ye have seen with your father.
39 They answered and said unto him, Abraham is our father. Jesus saith unto them, If ye were Abraham's children, ye would do the works of Abraham.
40 But now ye seek to kill me, a man that hath told you the truth, which I have heard of God: this did not Abraham.
41 Ye do the deeds of your father. Then said they to him, We be not born of fornication; we have one Father, even God.
42 Jesus said unto them, If God were your Father, ye would love me: for I proceeded forth and came from God; neither came I of myself, but he sent me.
43 Why do ye not understand my speech? even because ye cannot hear my word.
44 Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: F19 for he is a liar, and the father of it.
Now to say that Jesus was only referring to only the jews as the light contradicts so many more scriptures also Old and New Testament. Jesus taught more than just jews. He taught the multitudes in Syria and all around the area that had non jews in it to.