An Illumination Investigation

After this activity, students will be able to:

1. Analyze the illumination in a space using a digital light sensor.
2. Design energy-efficient solutions to improper illumination.

1. Familiarize yourself with the Science Journal smartphone app (how to collect and record data, and how to use the ambient light sensor).
   
2. Print out one Student Worksheet per student and one Recommended Light Levels handout per group of 2-3 students.

1. In groups, ask students to brainstorm ways to fix the types of over-illumination listed in the table on the board (from the warm-up). Have students write one solution per sticky note and stick it in the table in the appropriate place. For example, you could fix leaving the lights on in an empty room by turning the lights off when you leave the room.
   
2. Repeat the same process as above to brainstorm solutions for the problem of under-illumination.
   
3. Hand out the Recommended Light Levels handout and give students a few minutes to look over it. Ask them to describe what they notice about the information on the handout and ask any questions they have.
   
4. Pass out Student Worksheets and introduce the Challenge:

   Today you are going to visit different places around your school to:

   -Measure the illumination in each place and compare it to the Recommended Light Levels handout to determine if it is too high or too low.

   -Design a solution to fix one space's over-illumination if it is too bright, or to increase illumination in an energy-efficient manner if it is too low.
   

5. Pass out the smart phones and run through a quick tutorial on how to use the Science Journal app and Ambient Light sensor (optional).
   
6. Assign each group of students 1-2 places in the school to investigate. Give students about 10 minutes to take measurements and record their data in each place, then have them come back to the classroom to analyze their data.
   
7. Once you are back in the classroom, inspire your students with examples of well-designed and energy-efficient spaces, such as the California Academy of Sciences building or other natural/artificial lighting ideas (you'll find many Pinterest boards!).
   
8. Give each group a piece of poster board. Each group should choose one of the locations they investigated and design a solution for it, whether it was over-illuminated or under-illuminated. If the space they analyzed was properly illuminated, have students brainstorm a more energy-efficient way of lighting that space. Students will have about 15 minutes to draw up their designs on their poster board.
   
9. Share out: Groups can share their designs with their classmates through presentations or a class gallery walk.

Trends in Lighting in Commercial Buildings
Check out this U.S. Energy Information Administration's report to learn about how advents in new lighting technologies have allowed commercial buildings to significantly reduce their electricity use from lighting over the past 10+ years.