Thanks Kevin,
I have 10 Narva Blue T5 Tubes and 2 KZ Fiji Purple.
I also have 9 Radium 20K 400W Metal Halides- Just changed back from 9 Reeflux 10K's.
They are all mounted in 3 Giesemann Spectra light units.
I have been comparing to Reeflux 12K, so currently 8 Radium's and 1x 12K Reeflux 400W. They are very similar bulbs to my eyes, so I might leave them as is to compare what they are like in 6 months time.
Mo
You didn't like the 10k