You can see the dates on the file names - from 1/16 to 2/23: http://www.deepforestaquatics.com/aqua/18_2006
What you see grew with 7 hours of 3 wpg and super lean fertilization - mainly K and Fe/Traces. Lots of CO2 is a must.
With such lighting it stretches up a little (3/4" total height in the course of 1 month) but that proves very useful when you plant it in a new place. After planting you end up with about 1/4" of the plant sticking above the substrate. Amano shrimp are known for pulling HC out of the substrate so the ability to bury a lot of the plant in the substrate is a very good thing.