T5 bulbs comparison: blue

[LadyTang2]

When I first saw these 2 charts I thought to myself...

"These bulbs will emit nearly the same amount of blue light because the large 400-500 blobs are similar."...
"Wait, the Y-axis says relative, so when turned all the way up, more of the CPs brightness will come from 500s/600s so I cannot view the blobs like I first thought"

In other words (and I know I don't have the proper scientific working here but I think you'll get what I mean)... even if the two 400-500s region were identical, the CP would emit less of the 400-500 nm light than the CP because more if the CPs brightness would consist of other wavelengths.

Is this right? Wrong? Help me understand :)

 

[Aardvark1134]

This should help

 

[LadyTang2]

I'm not interested in what they look like, I am trying to understand exactly how much of the different nanometers they are putting out, relatively speaking between the BP and CP.

 

[tehmadreefer]

@ATI North America

 

[Aardvark1134]

If you zoom in on the 2 charts you can see the difference right in the graph.

 

[LadyTang2]

If you zoom in on the 2 charts you can see the difference right in the graph.

That would not help me, it's interpreting the graphs and what they mean in the context of my question

 

[LadyTang2]

Oops, correction to the bold sentence, "of" not if
even if the two 400-500s region were identical, the CP would emit less of the 400-500 nm light than the CP because more of the CPs brightness would consist of other wavelengths.

 

[taricha]

Is this right? Wrong? Help me understand

The charts are not normalized to the same total light. They are scaled so that the peak for mercury at 436nm is equal to 1.0 in both.
Good reason to believe that both lamps have same optical emission properties at that end of the blue spectrum.
The coral plus blocks less of the mercury emission in the green at 546 and yellow-green 578nm and also looks like it includes europium to get the red emission at 611nm.
I think the blue end emissions will be identical.

 

[Bpb]

You’re correct to be skeptical of smoothed and normalized spectral charts of most light sources. The the coral+ bulb (to me) behaves very similar to how it’s spectral chart looks though in comparison to the blue+. It’s still a very “cold” colored light with virtually no yellow hue (visually) to it. The green keeps it from looking totally magenta, but it still has an overall pinkish hue. Not as extreme as a purple+, but about 1/3 the way there. I know you’re speaking strictly of the charts, but I’m just sharing my opinion on it.

Par wise they’re basically identical which would, to me, indicate potentially a little less blue the phosphor to make up for the increased green, yellow, and red. If the sum of their parts is roughly equal anyway

 

[LadyTang2]

bump, a little disagreement here.

Does relative mean this much blue for that much green and red resulting in less total blue emission?