Luminous flux expresses the amount of light that comes from the source and is measured in lumens. Different wavelengths of light and the sensitivities of the human eye are taken into account. Simply put, more lumens means brighter light and less lumens means dimmer light from your lightbulb.
Outdoor includes all activities that take place outside. Outdoor can also be used to describe a segment of goods. Outdoor clothing or equipment therefore describes goods used outdoors.
A battery is a device that you can use as a power supply after you charge it. It's used as a power source. It's otherwise known as a rechargeable battery.
The ingress protection (IP) is an internationally standardised code that identifies the resistance of electrical appliances against the ingress of foreign items and liquids, especially water. It is expressed in the so-called IP code, which consists of the "IP" followed by two digits: the first indicates the protection against dangerous contact and foreign objects, the second indicates the degree of protection against water ingress.
