This sentence irks me. jul refers to an astronomical body, not the light it gives off.
Now it's possible my targ is quite special and has been collecting stars and needs the sun to round out his collection. But it's much more likely he just wants to bask in the warmth on a lazy day.
Irked, I say.
Agreed, need sun is an English idiom for getting sun exposure, and probably doesn't translate into Klingon.