Christopher, one way for you to overcome this problem is to invest
an Ott lamp. It reproduces a daylight spectrum of light thereby
eliminating the coloration problem you're experiencing. The light is
not overly bright, but it is effective. If Ott lamps are not
available in Africa, you might be able to try a full spectrum light
bulb, such as GE Reveal bulbs. That might work better, as well.
A question about your camera. In the settings area, is there a place
for you to adjust the white balance, or fluorescent, or incandescent
lighting, etc? If so, make sure the setting matches the type of
lighting the camera is using.
Lastly, there is an extensive thread here on Orchid that discusses
photography, lighting and positioning issues. You may wish to do a
search and see what comes up.