( These ( ( ( convert ( light energy ) ) ( into ( electrical energy ) ) ) . ) )
(ROOT (S (NP (DT These)) (VP (VBP convert) (NP (JJ light) (NN energy)) (PP (IN into) (NP (JJ electrical) (NN energy)))) (. .)))
These convert light energy into electrical 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)))) (. .)))