No, it won't work.

Euphorbia pulcherrima is a short day plant.

Do a Google search for the all too many websites with info on how to grow
and bloom the plant before doing something stupid.

The zone is irrelevant.


"TOM KAN PA" wrote in message
...
The foliage on last years poinsietta plant has come back nicely.
There are no lights on at night in my wife's office. In the day time there
is
natural and florescent lighting. Will this light/dark condition bring back
the
floral bracts?
This is in zone 5/6.