So, I've been looking around at info. What is the best tri-phosphor - brightest, best for plants, etc.? Tritons, or Ultra Tri-Luxes, or what? Also, does anyone on this list know anything about Arcadia (a UK company) and their lights - Freshwater FL or others (www.arcadia-uk.com)? I will be putting these tubes in my Perfecto single light 36" strip light. Thanks for all your help!