Somebody please help, I need a python to change lights bias to 0.2 or 0.1in all the lights in the scene since I'm using Poser 5 and it's very tedious to change all bias for all lights in a global set, I know it must be very easy to do but the true is I have no idea how to program Python.

Thank you.

My old Light Panel script changes Bias, along with most other settings.
It acts on all lights, or lights selected from a listbox.

http://ockhamsbungalow.com/Python/LightPanel7.zip

Thanks ockham, I use a version called newlightpanel that run in P5, the one that you name here doesn't work in P5, your newlightpanel is very useful for me, with it I delete, change map size and a lot of things but bias parameter go from 1 to 40 and cant set it to such an small value like 0.2 or 0.1, I've open it in a text editor to see if there is something I can change, but the true is it looks like basic mandarin for me :-) considering I speak spanish and try english LOL

I'll fix that immediately.  I didn't realize that was a problem.

Okay, I changed the Bias slider to use steps of .01 instead of 1.0 and
added the modified "newlightpanel" script to the main light panel ZIP. 

This version is named LightPanelP5.py in the ZIP because the name
"newlightpanel" could be confusing!

http://ockhamsbungalow.com/Python/LightPanel7.zip

OK thank you very much, you are great!!! testing now

It seam to be the same version you posted first, I get the same error and the name of the script is lightpanel.py

This is probably a result of caching in the website or your browser.
Here's a temporary upload of the new ZIP with a separate name:

http://ockhamsbungalow.com/Python/TempLightPanel.zip

I tested the light panelP5.py but bias or doesn't change or get 2.42 value
by the way it would be great to be able to increase the map size in steps of 64 if it's not asking too much.

Well, something is strange about the Min Bias.  I've tried a number
of different things but can't get it to respond.  I'll have to think about this.