When sourcing Glass LED Displays (also known as transparent LED screens), you must prioritize Transparency Rate, which should ideally be between 70% to 95% to ensure visibility through the glass. The Pixel Pitch (e.g., P3.91, P7.81) determines the resolution; smaller pitches are better for close-up viewing, while larger pitches are cost-effective for building facades. Additionally, verify the Brightness levels, ensuring at least 5000-7000 nits for outdoor-facing sunlight environments and 800-1500 nits for indoor applications.