Stay healthy with deeper sleep. Now you can enjoy a rare dark Himalayan Salt Lamp for your bedroom cutting out the light that salt lamps emit, no bright light with these! They must be left on and warm 24/7 for best results. Improves quality sleep, breath fresh clean air, may help with less snoring too! No two salt lamps alike however, equally beautiful and beneficial! Weight 5 to 7lbs Covers approximately 7 to 8 ft radius so keep them close to your bed for concentrated coverage.