( They ( ( ( convert ( electrical energy ) ) ( into ( ( light ( -LRB- ( radiant -RRB- ) ) ) energy ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP convert) (NP (JJ electrical) (NN energy)) (PP (IN into) (NP (ADJP (ADJP (JJ light)) (PRN (-LRB- -LRB-) (ADJP (JJ radiant)) (-RRB- -RRB-))) (NN energy)))) (. .)))
They convert electrical energy into light (radiant) energy.
(ROOT (S (NP (DT A) (JJ light) (NN bulb)) (VP (VBZ converts) (NP (JJ electrical) (NN energy)) (PP (TO to) (NP (JJ light) (CC and) (JJ thermal) (NN energy)))) (. .)))