I am all confused, Actinic vs 7,100 K blue bulb

[dz6t]

Someone please help me here.
Actinic vs. 7100K blue bulb

What the hack is 7100K blue anyway?

Any scientific data?

Good and bad?

 

[denvig]

This may help

http://www.cameraguild.com/technology/kelvin.htm
and
http://www.reeflightinginfo.arvixe.com/

 

[Marc]

7100K came out a few years ago, before true "O3" bulbs came out. 7100K PC bulbs are blue, but people prefer O3 bulbs for true actinic color.

 

[dz6t]

Found something like this:
http://www.reefs.org/library/article/actinic_lighting.html

 

[Greg Hiller]

IME the 'true' 03 bulbs are far superior to the 7100K bulbs.

 

[dz6t]

How can you tell a "true" 03 from a "not true" actinic?

Thanks