What is the difference between 我像太阳 and 我像陽光燦爛著? Below both statements supposedly translate to "I am like the sun".

我像陽光燦爛著 
Wǒ xiàng yángguāng cànlànzhe 

我像太阳
Wǒ xiàng tàiyáng


The first one comes from a song, the second one is more straightforward. 

I'm trying to understand how to correctly translate the first one to I am like the sun. Why isn't it I am like the brilliant sunshine? Should I just remember that yángguāng cànlànzhe is another word for The Sun ?
我像陽光燦爛著 means "I'm shinning like sunshine."

我像太阳 means "I'm like the Sun."

"I am like the brilliant sunshine." would be 我像燦爛的陽光

陽光燦爛著(yángguāng cànlànzhe) means "The Sun is shining."

著 is used for Present Progressive Tense or Present Participle. To put it simply, -ing.

The "brilliant" in the "I am like the brilliant sunshine." is a Adjective, so it should use 的(de)