The energy efficiency company has now raised about $57m and will seek to add climate and security control to its lighting control platform.

US-based smart sensor and lighting control technology company Enlighted secured $20m on Tuesday from existing backers including semiconductor producer Intel’s corporate venturing unit Intel Capital.

Intel was joined in the round by the rest of Enlighted’s existing investors, Draper Nexus Ventures, Kleiner Perkins Caufield & Byers, RockPort Capital Partners, and Draper Fisher Jurvetson.

Enlighted produces energy efficiency technology for use by businesses. Its core product is a lighting sensor, but the company is working on adding additional controls for heating,…