is there a scene with lanterns in the song?
Yes, the climactic musical sequence during which "I See the Light" is performed by Rapunzel and Flynn, commonly referred to as the "lantern sequence"
I See the Light
Contrastingly, the climactic musical sequence during which "I See the Light" is performed by Rapunzel and Flynn, commonly referred to as the "lantern sequence", has fared significantly better than the song itself, garnering widespread acclaim from film critics. 
who sings in tangled i see the light Alan Menken by whom was it written? Glenn Slater where is this person from? Brooklyn, New York what other project has this person worked on? Slater wrote the lyrics for the Off-Broadway stage revue "Newyorkers", his first work with Alan Menken was writing the lyrics for the film "Home on the Range", he also wrote the lyrics for the stage adaptation of Disney's "The Little Mermaid" has this person won any accolades? Yes,  Kleban Award for Lyrics, Grammy Award, Daytime Emmy Award, etc.
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I See the Light [SEP] Lantern sequence
Contrastingly, the climactic musical sequence during which "I See the Light" is performed by Rapunzel and Flynn, commonly referred to as the "lantern sequence", has fared significantly better than the song itself, garnering widespread acclaim from film critics. Keith Uhlich of "Time Out" described the scene as "especially wonderful", while "Digital Spy"s Simon Reynolds similarly hailed it as one of the film's most "striking moments". Although Georgie Hobbs of "Little White Lies "wrote that, lyrically, "I See the Light" is "nothing special", she went on to praise the scene, describing it as a "treat ... that will clinch it for romantics and 3-D tech-heads alike." "Radio Times" Alan Jones labeled the sequence one of the film's "most beautifully uplifting moments".