its the wording of your question i think. Royal blue vs. actinic blue? What are your trying to figure out exactly? If you are looking for growth bulbs then dont use actinic becuase they are lower in par and are not very borad in spectrum. On the other hand if you want them to help make your colors pop then actinic bulbs are the way to go. If you are using you power compacts as your main source of light then find a bulb that has an 11,000k spectrum which si more of a bright white. You could even find something similar to ati blue plus bulb which is heavy in the blue spectrum but is not classified as an actinic bulb. post what bulbs your are comparing so i can give you more specific advise.
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