Ancient Egyptian makeup For makeup too, the Egyptians had to turn to the natural ingredients that were available at the time. They used henna to colour their hair and to tint their nails, saffron was used as an eyeshadow, burnt almonds were used to darken their eyebrows and they used red ochre for their lips.
A lighting ballast is a piece of equipment required to control the starting and operating voltages of electrical gas discharge lights. Examples of gas discharge light sources include fluorescent and neon lights and high-intensity discharge (HID) lamps.
Briefly explain the functions of electronic ballast. The high frequency electronic ballast overcomes the above drawbacks. The basic functions of electronic ballast are: 1. To ignite the lamp 2. To stabilize the gas discharge 3. To supply the power to the lamp The electronic ballasts make use of modern power semi-conductor devices for their operation.