J, here's a link to a Lucalox
http://1000bulbs.com/product/2427/LU0400-44054.html?utm_source=SmartFeedGoogleBase&utm_medium=Shopping&utm_term=LU0400-44054&utm_content=400+Watt+-+High+Pressure+Sodium&utm_campaign=SmartFeedGoogleBaseShopping&gclid=COzD-LLThbECFYeo4AodxxjGEQ