The Norman LH500B lamphead is similar to the standard head except that this version includes a fan. All other specifications are the same. The LH500B is a 600 w/s studio lamphead with a cooling fan for use with soft boxes, grids, filters or gels. The fan provides a constant speed when the modeling lamp is dimmed, and it operates on 115 or 230V circuits. It operates with all Norman Series 500 power supplies including the P404, P808M, P808M/TLC and P808-1200/TLC. Its features include a high-impact resin housing that won't dent or scratch, and a modeling lamp on-off switch. A power supply for this flash head is required.