175W/250W Metal Halide - EP39 Base

Product Review

ED28 Metal Halide Lamp Features: ED28 Bulb Type EP39 (Position Oriented Mogul) Base Clear Finish Color Rendering Index (CRI): 65 10000-20000 Average Rated Hours 15000-40000 Lumens Color Temperature: 4000K Operating Position: Horizontal ± 45deg; 175W, 250W or 400W Standard (Probe) Start. Enclosed Rated. Specified Burning Position. HID (High Intensity Discharge) Basics: The operational concept of HID lamps are very similar to fluorescent lamps. HID lamps include Mercury Vapor, Metal Halide, High Pressure Sodium/Low Pressure Sodium (SOX). In an HID lamp, the electrical arc, gasses and metals are contained in the arc tube. Like fluorescents, HID lamps require a ballast to control the electrical current in the arc tube. HID lamps need a start-up time to reach their full brightness. This usually takes 5 to 10 minutes. Metal Halide Uses metal halides of sodium iodide and scandium iodide