Direct light. These plants thrive on or near windowsills facing east or west that receive at least a few hours of direct sun each day. Place them no more than a couple feet away from south-facing windows.

Croton (Codiaeum variegatum pictum)
Jade plant (Crassula arborescens)
Medicine plant (Aloe barbadenensis)
Ponytail palm (Nolina recurvata or Beaucarnia recurvata)