These lanterns are suitable for use with gas filled filament lamps of 100W to 1000W sizes and also for the 80W and 125W mercury discharge type.

The Duo-Dome refractor is made in three types of give symmetric 2-way 150^o non-axial, and 2-way 180^o axial distributions.

For Gas-filled Filament Lamps List No. Complete Unit Type Of Light Distribution Fitted for Lamp (Wattage) 516/4607 Symmetric 100-150 516/2/4607 2-Way 150 100-150 516/22/4607 2-Way 180 100-150 517/4607 Symmetric 200 517/2/4607 2-Way 150 200 517/22/4607 2-Way 180 200 518/4609 Symmetric 300-500 518/2/4609 2-Way 150 300-500 518/22/4609 2-Way 180 300-500 519/4611 Symmetric 500-1000 519/2/4611 2-Way 150 500-1000 519/22/4611 2-Way 180 500-1000 For 80W & 125W Mercury Discharge Type List No. Complete Unit Type Of Light Distribution Fitted for Lamp (Wattage) 557/4607 Symmetric 80 557/2/4607 2-Way 150 80 557/22/4607 2-Way 180 80 558/4609 Symmetric 125 558/2/4609 2-Way 150 125 558/22/4609 2-Way 180 125