One of the most interesting product of iGuzzini, Italian company of indoor and outdoor lighting design, is Gem, a pendant luminaire for indirect/direct lighting. Luminaires have two polycarbonate shells with a partial satin-finish. They are closed with special supports that are hooked to suspension cables (ordered separately as accessories).The joint between the two shells is water-tight thanks to a silicone gasket located around the light distribution perimeter and by a M12x1.5 nickel-plated brass cable-clamp for the exit of the power cable. An aluminium support plate houses the light source and the control gear box. Suspension cables are equipped with a system for highly precise adjustments.