I think brightnessAnimations of lightObjects is not working properly in 1.16.

left is 1.16 and right is 1.12, and the json is the same in both.
I used "duration" and "clampMax" to create a lamp that glows at 70~80% or lights up smoothly, but it doesn't work in version 1.16.
Only beam and flare seem to be working correctly.
Is this a bug or by design? Or is it just my environment?

Potentially? What graphics settings are you using in 1.16.5? Are you using the Wonderful/Fabulous? Because I'm just now hearing issues about that setting.

I had the graphics settings set to Fast until now. And optifine was not introduced.
Similarly for Fancy, duration and clampMax didn't work properly.
When set to Fabulous, lightObjects itself stopped working and transparent objects disappeared.

Noted. I've got a thread active on Discord looking at this very issue, so if you want to join there you'll find some similar folks and test builds once I figure this out. Otherwise, keep tabs here and when you see a commit pushed you'll know it's fixed.

@Munancho-Hepetonas are you using the latest release build or the source code?

Do you mean whether the mod version is the latest? I'm using 22.13.0 version

That is indeed what I mean. Are you able to join this Discord thread? I'm working on blended issues right now, and having yours in there and you able to test would help.

https://discord.com/channels/232316230852280320/1216077287653507112

Fixed as of one of the latest beta builds. Not sure which one though.

Fixed in 22.15.0.