Several years ago I used the 40 watt T12 lamp. It was a F40DX. They make a T8 version now.

It was a bit green but I used it in conjunction with a GroLux Standard as a dawn/dusk light.
It did balance out the purplish hue of the GroLux fairly well.
Philips is really good about sending spectral output graphs when you contact them thru their
website in the Contact section. I have a pdf with info on the bulb you're looking for (TLD950) but its too big to post here.