....-glo Advice

[Ginge]

I use the 42" ....-Glo range lights by hagen. I currently have the Sun-Glo and the Aqua-Glo. The sun gives off a yellow while the aqua gives off a purple glo. I dont really like the glo of the yellow one and i prefere a whit bright glo can anyone advise me on another type of bulb from this range i could purchase to enhance this white glow i would like to achieve.
Thanks.