Evolution of Light Sources

This image beautifully illustrates the journey of artificial light sources throughout history. Starting with the soft glow of a candle, it moves to the groundbreaking invention of the incandescent light bulb. We then see the more energy-efficient compact fluorescent lamp (CFL), representing a step forward in green technology. The progression culminates with the modern LED (Light Emitting Diode) bulb, showcasing the peak of energy efficiency and longevity in today's lighting solutions. It's a clear visual timeline of how illumination has transformed over time.

candle - incandescent - CFL - led - light evolution - illumination - technology