Why does the oil in the brass lamp turn green after 2 days after lighting it? - Quora

Why do we light ghee lamps for gods? What is the reason behind this? Some people light sesame oil lamps and mustard lamps. - Quora

I found a blue and red navigation light on a boat from the 60s, what is the story behind red and blue navigation lights? - Quora

What did the world use before the invention of the electric light? - Quora

Will toner remove the brassy color from brown orange dyed hair? - Quora

What is the reason for the color change from red to blue when using excessive fuel oil in a furnace? How can this issue be resolved? - Quora

Why do Hindus light oil lamps? - Quora

What is the spiritual significance of an oil lamp burning on its own? - Quora

How to get rid of green spots on metal surfaces like fridge handle or earphones? What are those actually? Can we use WD-40 - Quora

Why do people light oil lamps in front of God? - Quora

What is green gold? How does it get that color? - Quora