Photo: Randall Hagen Carleton has been pushing to the forefront of science and sustainability over the past years, whether through building a new integrated science center or transitioning to 100% carbon-neutral geothermal heating. But the work hasn’t stopped there. Now, the greenhouse facility — which houses plants for biology labs, as well as faculty and student research — is getting an energy-efficient upgrade. August 2020 saw the installation of new lights from Heliospectra, a leading horticultural lighting company. The company’s state-of-the-art control system will be added in May 2021, making Carleton the first small college in the country to implement the technology. Greenhouse Supervisor Randall Hagen and Manager of Energy and Sustainability Martha Larson have been looking to replace the greenhouse’s previous 1000-Watt high-pressure sodium lights for over a year.