Be warned that the price of all fluorescent globes is about to go through the roof. I think around 30%. This is from some time in August.
There is apparently a major shortage of phospherous world wide. What ever phospherous is measured in the price has jumped from 500 US$ to 5000 US$.
According to Osram there is going to be a big shortage of fluorescents in all types.
So buy now for the work we don't have and have your staff break and steal them before you can use them.