If you are not worring about multiple lights, I would suggest you to try 3 of our SP-250, which will be best option to replace your HPS; It is white light, full spectrum, three of them can cover your space very well. Now they are on the way to US, Canada warehouse, you can preorder now, and then once we have them around the middle of Feb, we will ship them to you; But if you are in a rush, you can also try other lights like our Mars Pro II Epistar 320 or Mars II 1600; They are big lights, one can suit your needs. If you have more question, you can feel free to let me know, post here or send me email: info@mars-hydro.com 
