Wait a minute! Purple leaves? Not enough light? I'd bet this guy is getting all the light he can handle without frying! I'd also bet you'll need a couple years under your grow conditions (don't change anything
) before you see another spike. It just works that way. Most orchids have to aclimate themselves to the new conditions before they will settle in. Some drop leaves, some sulk (no growths or no action) some turn reddish from high light, some just jump right out with a new spike. No way to know for sure, but until this guy has a couple more years with you, I wouldn't worry. ps: I have no clue what kind it is. I am very certain it is getting all the light it can handle, however.
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Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)