Figure 5.
Light illuminance levels, comparing measurements in an open field, with and without (a) solar Class 2 wrap-around, (b) solar Class 3 (classic), and (c) solar Class 2 (classic) sunglasses.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.