ROBERT SIEGEL, HOST:
Now, health and electrical lighting. Last month, Mariana Figueiro showed me something she has developed to help seniors avoid falls in the night. Figueiro researches health applications at the Lighting Research Center at Rennselaer Polytechnic Institute in Troy, New York. Her project is a nightlight. But it's not just a single bulb. It's a string of yellow lights that border the darkened entrance to, say, a bathroom.
It's a doorway and around the frame of the doorway are the yellow LEDs?
MARIANA FIGUEIRO: That's correct.