kelvin rating of...

[Discomafia]

Just as the title says... I did some googling, but couldn't find the number I'm looking for, can anyone who uses this bulb help?

 

[Discomafia]

Noone here uses a Power Glo bulb? Don't make me make a trip to the lfs guys, I always get carried away when I'm there...

 

[yvez9]

i've been looking for like 15 minutes and can't find it....

 

[Discomafia]

Online you mean? Or on the "box" it came in? They don't specify on the bulb, but if you've been looking at the "box" it came in for 15 mins, then I guess it's not there. Dunno how I could have been mistaken...

 

[Colin_BC]

This is copied off the box of a Power-Glo. It gives you the Kelvin rating of all their bulbs.

Flora-Glo = 2800K
Sun-Glo = 4200K
Life-Glo = 6700K
Aqua-Glo = 18000K
Power-Glo = 18000K
Marine-Glo = --------

The box says the Power-Glo has a Lux of 80.

What the heck, here are the pics of the box.

Colin

 

[Discomafia]

ALRIGHT!!! You da man Colin_BC!

Thanks for all that, exactly what I needed.

No info on the Marine-Glo, how come?

 

[Colin_BC]

I think because the spectrum on the marine glo is a dark light and probably doesn't measure on whatever it is they use to get Kelvin ratings. Having not researched this, I can only speculate. I've used a marine-glo and it does give the tank a cool colour provided the rest of your lights don't overpower it), but it serves no use for growing plants. I've thought of using a marine glo as a night-light for my tanks, but I don't know if it will interfere with the plants night cycle.

Colin

 

[Discomafia]

Plants have a night cycle? Interesting... Would you care to elaborate? Do you know the Lux of AguaGlo? That'd have to be the only diff. between the two, right?

 

[Colin_BC]

The plants "night cycle" being the period of darkness when photosynthesis temporarily stops. During this time the plants cease to consume CO2 and hence cease/slow production of oxygen. This is why many experience a drop in pH at night time if injecting CO2 to their tanks. This can also cause fish to gasp at the surface for air since the CO2 levels rise and the oxygen levels drop. I'm by no means an expert on this subject, however I think a certain length of darkness is only natural for plants, as with fish and most other living things. With the idea of using the marine glo as a tank night-light I worried that having it on at nights allowing no periods of total darkness may eventually exhaust or harm the plants, as well as perhaps cause an algae bloom. For all I know the marine-glo may undetectable by plants and fish, but I really don't know for certain....

Colin

 

[Colin_BC]

Oh yeah, as for th Lux, here you go:

Sun-Glo = 125
Aqua-Glo = 55
Power-Glo = 80
Marine-Glo = 50

Colin

 

[Discomafia]

Thanks for the info. You said that "allowing no periods of total darkness may eventually exhaust or harm the plants, as well as perhaps cause an algae bloom." but what about people who have LED or cold cathode lighting for after hours viewing pleasure?