How to calculate the k (colour temp) of a combination of bulbs?

Magickiwi · #1 09-11-2013, 03:06 PM

I think a Fuji purple is 420nm.

tang daddy · #2 09-11-2013, 03:12 PM

Fuji apples.....

Fiji purple is 15k same as the Ati purple plus.

kien · #3 09-11-2013, 03:15 PM

Quote:

Originally Posted by tang daddy

Fuji apples.....

Fiji purple is 15k same as the Ati purple plus.

That makes sense. It does seem like a 15(ish)K to me.

Aquattro · #4 09-11-2013, 03:21 PM

The closer to white, more growth. More blue, better looking. Find a compromise you like looking at

Coming up with some random number based on averaging different bulbs is at best a WAG. Even bulbs from different manufacturers rated at the same K look different.

kien · #5 09-11-2013, 03:23 PM

Quote:

Originally Posted by Aquattro

Coming up with some random number based on averaging different bulbs is at best a WAG.

but this hobby is all about the numbers man!

Aquattro · #6 09-11-2013, 03:24 PM

Quote:

Originally Posted by kien

but this hobby is all about the numbers man!

True, unfortunately

tang daddy · #7 09-11-2013, 04:04 PM

Never heard the term WAG, what does it stand for?

As I said in my first statement it's pretty much a guess.... But playing with different bulb combo and what my eyes perceive in colour that's what I temp looks like to me.

A quick search on urban dictionary:

1. WAG
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(abbv: wives and girlfriends)

A selection of overpublicised, vacuous anorexics found lurking at football matches, easily distinguised by their orange skin tone and high body plastic index, ostensibly present for the purpose of pleasuring the England football team, but in reality with the intention of being photographed obtaining fashion advice from chief WAG Mrs. Beckham in the hope that this will lead to a future appearance on "celebrity love island".

kien · #8 09-11-2013, 03:14 PM

Quote:

Originally Posted by Magickiwi

I think a Fuji purple is 420nm.

I have no idea what the wavelength of the fiji purple bulb is either. If I recall correctly that bulb's spectral graph peaks in two places, the mid 400s and down in the mid 600s. No clue what its over all wavelength would be. I'd imagine that makes figuring its colour temperature even harder.