Venki, the ballasts i`m running are sylvania metalarc m58 and 59 they are about 2 years and 9 months old. I bought the 14k`s from j&l a few months ago and i find there is not much intensity on the 400 or the 250. the colour is quite blue which i don`t mind but not a whole lot of difference from the vho`s. any suggestions would be great.