When choosing a salt lamp for you home here are some of the features to think about are Size, Color, Surface, Bulb.
For Size: When picking out an appropriate size use this rule of thumb: 1 lb filters 4’x4′ sq of a room.
For color: the darker the better. These are considered higher quality crystals.
For Surface: It is extremely important. Rougher surfaces have a larger surface area which are more effective at improving air quality.
For Bulb: we recommends not using LED bulbs. We use heat-producing bulbs for maximum effect. 15 watt incandescent light bulb may be the best.