I need help in dividing 7 growth paph

[desertgal]

Hi....As you all know by now I love yellow orchids. I purchased a
Paphiopedilum Dollgoldi Orchid 7 Growth Yellow Paph. It is in a 4 inch pot.
The largest growth has 10 inch leaves from tip to tip and the smallest has 4 inch leaves. From the bottom of the pot to the tip of the tallest leaf is 8 inches. One of the largest leaves is yellowing. My questions are should I divide it or leave it alone? If I do divide it how and how many growths? I am not happy with medium, it appears to be clay balls and I cannot judge the wetness of the medium. Should I just put it a larger pot (maybe 5 inch orchid pot with slits) and use a different medium? If so can I use fine bark with perlite and charcoal? What percentages of each? Or make suggestions
(are you listening PoP)?

I have also included a small picture of my new lighting. The bulbs are the twisted flourescents that use 23 W and give 100 W of light. They do not get hot but seem to be supplying a lot of light.

Thanks for your help,

Katie