Question: 64. The purpose of a refractor on a streetlight is
a. to correct the color given off by the bulb
b. to produce the required light pattern at street level
c. to keep birds and insects out of the streetlight head
d. to weatherproof the light
1. **Stating the problem:** Determine the purpose of a refractor on a streetlight.
2. **Explanation:** A refractor in lighting is an optical device designed to bend or redirect light.
3. **Purpose of a refractor:** It is used to shape or control the light distribution pattern.
4. **Answer:** The refractor produces the required light pattern at street level to ensure proper illumination.
**Final answer:** b. to produce the required light pattern at street level