What evidence do you have for the claim that the new lights reduced energy use?

How to say “What evidence do you have for the claim that the new lights reduced energy use?” in Japanese

In Japanese

新(あたら)しい照明(しょうめい)に替(か)えて電気(でんき)の使用量(しようりょう)が減(へ)ったという主張(しゅちょう)には、どんな証拠(しょうこ)がありますか。

Atarashii shōmei ni kaete denki no shiyōryō ga hetta to iu shuchō ni wa, donna shōko ga arimasu ka.

What evidence do you have for the claim that the new lights reduced energy use? in other languages