<a href=showthread.php?s=&postid=12632038#post12632038 target=_blank>Originally posted</a> by Peter Eichler
The actinic + is not an actinic at all and is just a bluer spectrum bulb and similar to the ATI Blue + but most consider the ATI the superior bulb. The Aquablue Plus is actually rated at 11k not 15k and is similar to the ATI Aquablue Special, but again the ATI is considered the better bulb by most.