Compact 115v design: Fits into tight spaces and reduces installation complexity
Clear and gray tube shape: Enhances light diffusion and color quality
High efficiency: Delivers powerful illumination with less energy use
Summarized by Shop
HPL stands for "High Performance Lamp". ETC Developed this lamp with their source four line of fixtures. If you look closely, the lamp uses 4 filaments oriented tightly in the center of the lamp. Get it? Source 4? By doing this they were able to get outputs that rivaled 1000w lamps with only 575w.