Unreal Niagara Light Renderer Question

I made a firefly with Unreal Niagara.
I’m trying to use Niagara’s Light Render to let the illuminator affect the surrounding environment.
I want the size of the particle to grow from 0 to growing at the same time as the light’s brightness changes accordingly.
However, when the particle size is greater than 0, the light is turned on immediately. It’s like turning on a light switch.

I was wondering if there is a way to adjust the brightness of the light according to the size of the particles.

Hey @XD_XD2!

Your best bet for scaling the intensity of the light as your particle grows may be to scale the color of your particles as the particle grows, as your light renderer is directly affected by that value. Check out this non-Epic affiliated video that gives a demonstration:

UE4 - Niagara Light Renderer

I hope the above solution works for you!