When evaluating Epson projectors, you must prioritize 3LCD technology, which ensures equal color and white brightness. Key specs include Lumens (Brightness)—aim for at least 3,000-4,000 lumens for office environments—and Resolution, ranging from WUXGA (1920x1200) for professional presentations to 4K Enhancement for high-end home cinema or signage. Additionally, check the Contrast Ratio (ideally 15,000:1 or higher) and Lamp Life/Laser Source duration, which should exceed 20,000 hours for laser models to minimize maintenance costs.