ADVANCE MFG# LI501H4, Ballast Ignitor 1-7/8 Diameter 400W HPS

Val-U-Pak Plus (77L) Ballast Ignitor High Pressure Sodium Ballast Bulb Type Max Bulb Watts 400 W Max Distance to Bulb 2 ft Number of Bulbs Supported 1 1 7/8 in Diameter 2 1/2 in Length