What is multi-wattage?

Multi-wattage means you can use the bulb at any one of three watts at any one time in the same bulb. Like this bulb has 15W; Wattage of 8W and 0.5W is given.

What needs to be done to use this LED torch at another watt?

To change the bulb from one watt to another at any time, you will have to turn the switch off and on again. The wattage of the bulb will change automatically.

What is the Environmental Protection Agency?

The Environmental Protection Agency protects people and the environment from significant health risks, sponsors and conducts research, and develops and enforces environmental regulations .