Sump/fuge for a large cube

[Ruth]

I must be confusing. I already have 2 X Luminarc 111 pendants
http://www.pacificgardensupply.com/products.asp?cat=2
with the connections and ballasts. I will be adding another 2 (I think), selling the 250W fixture and wondered how I would incorporate some VHO actinic lighting into this set up.