from Wetwebmedia
" Medium lighting and weaker current are appreciated by Euphyllids. Many are collected in shallow, turbid waters in the cover of mud/silt and seagrasses. Excessive water movement can be a cause of sweeper tentacle extension and subsequent stinging of tankmates. Likewise, the family is quite susceptible to photo-shock. New specimens should never be exposed to powerful lighting. Instead, place them in deeper, indirectly illuminated areas initially. "
I would place it from middle to upper middle tank under your PC lighting.
JMO