Check the listing for details. Robertson PSP2GPH40HOIVDW Electronic Program Start Ballast 100-277V. Condition: New. Listed at 50.00 USD. The Robertson PSP2GPH40HOIVDW Electronic Program Start Ballast is a reliable and efficient lighting accessory designed for use with lamps and lighting fixtures. With a voltage range of 100-277V, this ballast offers consistent and stable power supply for your lighting needs. Its maximum case temperature of 185F/85C ensures optimal performance and longevity, making it an ideal choice for any home or garden lighting setup. The Robertson brand is known for its quality and durability, making this ballast a trusted option for your lighting requirements.