The grid on the top disperses light upwards and provides good general lighting. The grid on the bottom protects against glare and projects a pleasant light downwards.Thanks to the design of the ceiling cup, you will easily be able get it straight and close to the ceiling.Light bulbs sold separately. IKEA recommends LED bulb E26 globe opal white (3 pcs).Use an opal light bulb if you have an ordinary lamp shade or lamp and want an even, diffused distribution of light.May be completed with other lamps in the same series.Designer