aiBlackbody produce a result different from the color Temperature option on lights ?

[lcollod]

So i did some experimentation with blackbody recently and came to an issue where the aiblackbody node, at the same temperature given produce a different result than the pre-integrated option on lights.

Here is a test, 3 area lights with the same settings: exposure 20 - Temperature: 2000K
> Right one use the temperature option on the light

>Middle one use the aiblackbody node plugged in the color, normalize option is off, intensity to 1

>Left one use the aiblackbody node plugged in the color, normalize option is on, intensity to 1

It seems that chromaticity doesn't change between the different light but only intensity. So how can i get the same result as the temperature option on the light ?

Did i miss something somewhere ?

Arnold 6+ ; Maya 2018