1.What’s Watt ?
The unit of electrical power as used by an electrical device during its operation. Many lamps come with rating in watts to indicate their power consumpt
The international (SI) unit of luminous flux or quantity of light and equals the amount of light that is spread over a square foot of surface by one candle power when all parts of the surface are exactly one foot from the light source.
3.How to explain “ZigBee“ ?
A low -power ,low date rate, local area wireless network; ideal for lighting control.