Originally Posted by Quantum
my experience is that T8s don't do well in fixtures with ballasts designed for T12s, the wattage is wrong as well as other aspects like operating frequency, apparently some work, but the ones I've tried just flickered dimly
I would just get a T12 bulb like this: F20T12 Fluorescent Lamp - Daylight
most 50/50 bulbs are meant for marine applications in that half of the light is full spectrum while the other half is single wavelength in the 400 nm range for corals and such
Thank you for your reply..... as ive said i dont have any clue about "kelvin temperature" Sorry if
this comes across "dumb".
I have a old T12 coralife 7,100k and it's pretty much a black light. (why it's sat with $45 price tag still on it unused since... my guess is 1985)
My bulb now has a violet look to it but who knows how long i used it before it sat for 5-8years.
I currently have young Green Terrors, Blue Acaras, 1 Jack Dempsey.
And the Blue Atlantic Makes the blue and the orangeish yellow in the fins "pop"
but makes the green in the bodies and everything else look like **** and very dark.
That's the ONLY reason i went 50/50 is i was told half Atlantic blue half bright day light.
6,500k / 420nm
The one you pointed out is only 6,500k (which is equal to the UltraSun SuperDaylight)
but me having not much knowledge between 3,000K and 7,000k or what a "nm" is.
Would that "daylight" bulb still bring out the beautiful bright blue spots on my Jack Dempsey,
or the "war paint" like look of my Green Terror's or is that where the "nm" and blue spectrum
of the bulb comes into play??
I've read 2 or 3 other posts here about others TRYING to get T8's to work in their T12 fixtures
and seems all ended up just changing the ballast and now running T8's fine.
No one said what make or model they chose and i went surfing and found 8 or 9 ballasts
that "might" work.
Thought i better ask people in the know and know actually know about this stuff before i order blindly.
surfed around a few sites and seems like PRO's here and an abundance of knowledge on this forum.