... for solar street lighting, channel lighting etc.Low Pressure Sodium Lamp, BallastLight effect parameters of low-pressure sodium lamps ModelPowerLuminous ... lamps Input voltagePowerAmbient temperatureProtection classDC12V18W,26W,35W,36W,55W-30°C-+55°CIP65DC24V 18W,26W,35W,36W,55W,66W,90W- ... 30°C-+55°CIP65DC220V18W,26W,35W,36W,55W,66W,90W-30°C-+55°CIP65