I am not sure of the age of the bulbs. Currently there are 3 MH and 1 of the 4 PC light bulbs. When I purchased them I saw 2 MH and 2 PC Working. I have since cleaned the unit up some and tried to rearrange bulbs to ensure all sockets were working. In doing so the white/ceramic part on the edge of one of the DE MH bulbs was so brittle it fell apart. Similar thing happened with one of the PC bulbs. I didnt mess with the other MH bulb, since it looks very brittle as well.
My intention if I keep it is to get all new bulbs and install them. I feel pretty good that everything should work properly this looks to be a pretty well designed light, and it isnt that old. I have looked around online and the new sockets for the lights are fairly cheap if those would be neccessary.
PM me your phone number if this was confusing or if you would like to chat about it.