yes the box is very heavy and the manufacture date says 1998 but i cant find the the numbers i need to google all it says is high intensity discharge grow light/high pressure sodiumn and one one of them somebody wrote in black marker Mh 400 watt. if you can use 2 typs of bulbs then i think who ever had them before used one for MH and the other a hps that would make sense wouldint it.
i no what ill do ill take some pics of the units and besides you all need to see my 1 outdoor plant in my back yard shes looking good i think im still a newbie