The 24-year-old has plundered 31 goals in just 43 top-flight appearances since joining the Reds.
"I'm really pleased for Sturridge because at Chelsea I think he was a bit frustrated," said Lampard. "He felt he could have played more.
"He felt the position he was playing in was one he wasn't quite happy with and it was good for him to move in the end.
"It was may not be good business for Chelsea. It looks bad, but you look back and you never know.
"Individually for him it was a good move. He has gone from strength to strength."
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