To diffuse the light otherwise a bright and straight light beam from the bulb will hurt your eyes.
Unlike LED lampne, halogen lamp is a type of incandescent lamp.
Just goes to prove, there are no stupid questions. Only stupid people asking questions. The answer: No. Next question?
LPS is a monochromatic lamp and HPS is not.
The word "lamp" comes to us through the French language, through Latin, from the Greek word "Lampein", which means "to shine".