Article & News

Day: September 16, 2026

Bare bulb, complete pendant and room model represent different boundaries when selecting photometric data

LED filament Bulb

Your Bulb’s IES File Is Not Your Pendant’s Photometry

Featured image: Original conceptual diagram. Not a measured light distribution, photometric file or tested HongYu luminaire. A supplier sends an IES file for a decorative

September 16, 2026 No Comments

Power factor, driver efficiency and lamp luminous efficacy are three different quantities with different definitions

LED filament Bulb

PF 0.9 Is Not 90% Efficiency: Stop Ranking LED Bulbs by the Wrong Number

Featured image: Original editorial diagram. Definitions and hypothetical calculations are not HongYu test results. Two suppliers quote a decorative LED bulb. One highlights a power

September 16, 2026 No Comments

Article & News

Day: September 16, 2026

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