Point Light shows falloff banding (size values between 0.0001 ~ 0.1)

[kintuX]

.blend file (w/ LuxCore exports):
PointLightBanding-BUG.zip

Steps to reproduce:

1. Open attached file.
2. Set/Check render engine.
3. See rendered viewport or render still (f12)

Screenshots or rendered images:
Cycles:

BlendLuxCore:

Error message from Blender console: none

Error message from LuxCoreUI console: RenderConfig loading error: bad lexical cast: source type value could not be interpreted as target

OS: Windows10
Blender version: 2.83
LuxCore version: 2.4beta (latest from 2020-06-04)

[Dade916]

Error message from LuxCoreUI console: RenderConfig loading error: bad lexical cast: source type value could not be interpreted as target

This error comes from this:

scene.materials.Material1942792493976.id = 13,398,304
...
scene.objects.19434461667760.id = 3,772,660,237

You C library printing integer numbers with ",".

I'm looking in bands problem.

[Dade916]

I should have fixed the banding problem. As expected, it was a numerical precision problem due to very small light radius.

[kintuX]

I should have fixed the banding problem. As expected, it was a numerical precision problem due to very small light radius.

I confirm, the banding isssue with small Point Light radius is gone.

BTW (&Note to self), the LuxCoreUI error sprouts from BlendLuxCore when Object and/or Material IDs have negative values. In this case both were set to -1.
Am I right to assume it's BlendLuxCore bug & report the issue?