Pygmy flowers - why don't they open fully

[Cindy]

Hi everyone, these D. puchella hybrids plants are growing very well under T5 lights. But somehow the flowers do not open up fully. Is it due to the wavelength of the tubes?

 

[pingman]

Cindy, are you sure they aren't open some part of the day? Many of these seem to open only for a few hours!
Peter

 

[Cindy]

Pingman, I have been at home and watching them. The widest they open is like in the 3rd pic.

 

[Cindy]

More pics.

 

[jimscott]

You must like pulchella like I like gypsicola! Now go out and get some D. callistos and bring back pictures of orange flowers!