The D-D Marine T5 Fluorescent Lamp is a 60/40 white/blue blend.

See Larger Image for Wavelength Spectral Plot

It was specifically developed for growing SPS coral down to 800cm.
60% actinic 40% white
Color Temperature approx 11,000 K

This lamp can be used alone or used in a 2:1 or 3:1 with Pure Actinic or Actinic + lamps.

Expect these lamps to last up to 24 months with a high quality electronic ballast from IceCap.

The Aquablue + lamp is pictured on the far left and it puts out white light so don't let the name of the lamp fool you.