churchhaze
Well-Known Member
Let's assume you are starting fresh.
You decide on half 2700k 80cri leds and half 4000k 80cri leds. Assume you picked a vero series cob. Both the 2700k and the 4000k use very similar phosphors. The main difference is one has more 450nm while the other has more "wide-band" output.
Here's is a breakdown of this 50-50 strategy:
1. Put the 2700k cri phosphors on half the blue dies to convert most of the blue to the wide band.
2. After converting half of your blue photons to a wide band, you decide there isn't enough blue so for the other half of your blue photons, use 4000k 80cri phosphors so less blue is converted.
Here is the problem with this strategy. There is a loss when converting higher energy photons (blue) to lower energy photons (wide band centered around yellow). If you know in advance you will need more blue photons, why would you convert the first 50% of your blue photons to wide-band?
It would make sense in this case to get all 3500k up front, assuming that's the amount of blue you want. Getting a cool white later makes sense if you decide in the future you need to supplement blue, but it doesn't make sense in up front planning.
You decide on half 2700k 80cri leds and half 4000k 80cri leds. Assume you picked a vero series cob. Both the 2700k and the 4000k use very similar phosphors. The main difference is one has more 450nm while the other has more "wide-band" output.
Here's is a breakdown of this 50-50 strategy:
1. Put the 2700k cri phosphors on half the blue dies to convert most of the blue to the wide band.
2. After converting half of your blue photons to a wide band, you decide there isn't enough blue so for the other half of your blue photons, use 4000k 80cri phosphors so less blue is converted.
Here is the problem with this strategy. There is a loss when converting higher energy photons (blue) to lower energy photons (wide band centered around yellow). If you know in advance you will need more blue photons, why would you convert the first 50% of your blue photons to wide-band?
It would make sense in this case to get all 3500k up front, assuming that's the amount of blue you want. Getting a cool white later makes sense if you decide in the future you need to supplement blue, but it doesn't make sense in up front planning.
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