Authentic Supplication Number 116.

The Prophet  said: “Whoever would read Surat Al-Kahf on Friday it would provide him of light for the duration between the two Fridays.

Reporters.
‘Al-‘Adawee said that opinions differed about this badeeth. He said that it was reported by ‘Al-Hakim, page 564 of volume 1 who said that it was of sound ascription. He also said that it had testimonial in a hadeeth reported by way of ‘Ibn `Umar in Targheeb, page 513 of volume 1. ‘Al-‘Albani said that it was reported by ‘Al-Bayhaqi, and ‘Al-Hakim. It is in his Saheeh Al-Jami`i As-Sagheeri wa Ziyadatihi as #6470, and he said it was sound.