This is a very small, portable package that produces a very bright white light and lasts between 2 and 3 months of continuous use attached magnetically to a 9 V battery.

It is safer than a candle when the power goes out and has many other uses like emergency car light, portable camp light, porch light, etc.

Convenient source of light when the power goes out; I also use them as night lights around the house placed above thresholds etc.