So I had a 600 watt nanolux ballast blow and I’m ordering a replacement and decided to go with the quantum 1000 watt and hortilux super hps bulb combo from growershouse. The customer service rep calls me and tells me hortilux is no longer making ANY single ended bulbs and is concentrating on the LED market. Any die hard hortilux fans out there better get ‘‘em while u can. He offered me a fucking Plantmax bulb as a comparable alternative. We settled on a Ushio. Never had one before but we will see.