Salt lamps and T-lights both give a warm glow to any environment while the crystal produces healthy negative ions. These ions improve the quality of the air (especially where TV's, computers and microwaves are used) which promotes good health. This product is sold with a separate UK certified lead. It will be added Free of Charge at the basket. This product includes a complementary E14 Filament Bulb per lamp purchased. Due to this product including a complementary bulb we are unable to replace or exchange them if faulty.