I bought this little gem last summer. Put it into a semi-hydro setup using lava rocks and pumice as substrate, and it just sat there doing nothing for months; but finally, it began to send out new growths and flower spikes couple of weeks ago.
Mine developed some deep purple tinge on the leaves, indicating it had received more than enough sunlight...but so far there is no sign of sunburn or damage, so I am going to keep it as it is for now...it looks pretty btw.
Personally, I might back off on the light a bit. I have grown some restrepias, but not enough to know how well this applies, but my "gut" tells me there is an optimal light level for each plant where peak performance occurs. That much pigmentation suggests you're past that peak.