rtparty
Raise The Reef!
<a href=showthread.php?s=&postid=15585271#post15585271 target=_blank>Originally posted</a> by Lyfey
Grim. Whats the difference besides par between a blue bulb and an actinic? Basic question but I really dont know.
The color of the bulb and the light spectrum it puts out. Actinic light is violet and in the 420nm wave length. Blue bulbs have a lot of actinic in them but have a lot more blue.
Go to reefgeek.com and look at the spectral graphs for an actinic bulb and an ATI Blue Plus.
Blue bulbs also have a ton more PAR like you said.