Saturday, August 22, 2009

The red Four O'Clocks seem to like the cold

The red Four O'Clocks always started opening later than the others, and they didn't even fully open in the middle of the night. Today and tonight are especially cold, and they've finally fully opened. Under incandescent light they seem red:

but white LED and strobe light bring out a magenta star:

A near-UV LED does not do anything interesting.

No comments: