N.o.
I have always used NO for actinics. I have (2) 48" 40 watt actinics over my 90 supplementing (2) 40W 48" 10000K and 14K 250W MH. My coraline growth has always been exceptional, and you can use the actinics for a long time. (mine are over a year old and still have good life left in them. I'm sure that others will disagree, but the results speak for themselves.
T5 bulbs are reasonably priced, compact, and efficient as well, so I might retrofit with them in the near future.
Hope that answers your question.
Rich.
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90gal Starfire mixed reef, 400W MH (Giesemann 13K megachrome/Icecap E-ballast), (2) 54W T5 Giesemann true actinic, 45gal sump (65W 50/50 PC), ASM G-3 Skimmer, Mak 4 return, Sequence Dart closed loop, foam backdrop, 120 lbs LR, 2" sandbed, & 1 dillhole running the show.
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