The Effect of Light on an Environment

Natural and artificial light have a significant effect on the experience of hospital patients and can actually reduce stress and hospital time, says Rosalyn Cama, an interior designer and researcher specializes in health care design.

1 minute read

May 10, 2011, 11:00 AM PDT

By Tim Halbur


Susan S. Szenasy talks to Cama about her research and how the built environment and its use of lighting influences health.

"SSS: What is the one, big mistake designers make in combining daylighting with artificial lighting, from a human well-being point of view?

RC: Believe or not, many architects and developers are still not paying attention to the sun's orientation in siting a building. The light levels on one side of the hall versus the other can influence how long you will recover, therefore need different artificial lighting adjustments. The sunny side of the building can offer 46% greater sunlight intensity, which will require 22% less pain medication with a financial gain of 21% reduction in the cost of those medications."

Tuesday, May 10, 2011 in Metropolis Magazine

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

September 16, 2026 - Zachary Whalen

Passengers board an Amtrak train under a cloudy sky.

Amtrak, CN end decades-long dispute with eight-year agreement

The new operating agreement establishes an updated framework for the companies to work together, including processes to resolve disputes.

September 18, 2026 - Mass Transit

A coal power plant in Iowa billows smoke into the air.

Nation's most wind-powered state turns to coal as data centers increase energy demand

For the first time in decades, Iowa has increased its generation of coal power.

September 17, 2026 - Inside Climate News

A rendering of the planned bridge over a large river. The bridge has two main support beams that form diamond shaped arches over the bridge.

Alabama scores up to $2.5 billion federal loan for largest infrastructure project in state’s history

The Mobile River Bridge and Bayway Project aims to ease congestion at Alabama’s worst bottleneck.

6 hours ago - NBC 15

Public land in Idaho. Most of the photo is a green field, with mountains and a forest in the distance.

Trump is considering data centers on 6 states' public land — some state officials say they had no idea

If the administration approves the proposed projects, data center and data center-related developments will cover 17,600 acres of public land.

7 hours ago - The Washington Sun

Two construction workers on a wind turbine, with two more in the background against a pink sky.

Despite court ruling, Trump is keeping nearly all wind projects in the US on hold

At least 110 wind energy projects have not heard from the government since a federal judge ruled that the Trump administration's freeze on wind turbine clearances was likely illegal.

September 20 - Heatmap