Scene does not have consistent lighting
Please forgive me if this is posted in the wrong discussion and if so direct me to where I should ask this.
I am in the process of making my first full length animation. I have made many many scenes and I am in the process of rendering them. Some of the scenes I did not test out the lighting first as I figured I would do all that as I got to that scene to render. Also, i didn't do it because it was the same scene backdrop I had used on other scenes that I already liked the lighting. I.E. the same bedroom scene set up.
Ok heres the problem. About half the scenes in the bedroom when I add the lighting(there is a button in the app/scene that says add lighting. can't be simpler.) The lighting comes out perfect. You have to turn the lighting off when working on the scene as it's way to dark to see it with the lighting on. I know, sounds backwards as hell but it is what it is. LOL. Then the other half when I hit Add lighting the colors are dulled out compared to the other scenes but far worse, it is way too bright. So much so it is difficult to see the characters. Now mind you this is the same exact scene, same lighting button and same characters. The only difference is I made the scenes at different times.
Now heres the freakiy thing. I will take the characters from the scene that is too bright and make a group of just the characters. I will delete every thing else in the scene and import the characters to a scene that I know the lighting is correct in when i add the lighting. I add the lighting and now the scene that used to be correct now has the bad lighting of the scene I imported the characters from. If I delete the characters that I imported, the scene remains with the bad lighting. if I reinstall the scene with the good lighting without the imported characters the lighting is correct again. I can only assume something is wrong with those characters I imported. But what? And how can I fix it short of redoing all the scenes over? And if i did redo them over, what gaurentee will I have the lighting will be good?
Ok, I just tried the reverse way. I take the scene with the good lighting and delete those characters. Then I import the characters from the bad lighting scene to the good scene and that actually fixed the problem. Why in the world does it work one way and not the other is beyond me.

Comments
I suspect you have different settings in Tone Mapping or Environment in the Render Settings pane's Editor tab - rende settings are, by default, saved and loaded with the scene (when using Open, not Merge). I found the deleting and importing steps a bit confusing so not sure if that might be a contra-indication or not. You could try loading a working scene, File>Save As>Render Preset, then open the bad scene and apply that preset (you may want to use the options dialogue to exclude the aniamtion details, since those are presumably meant to differ).
Thanks Richard for the reply. I checked all the rendering settings and they seemed the same between the good scene and the bad scene. Not syaing your wrong, just saying if what you said is correct I just missed something. What I guess may have happened and you can tell me if I am off is I MAY have made the scenes with the bad ligthing without having loaded the entire bedroom scene in order to speed things up. for example. I may have just loaded the bed from the scene, posed the characters around and on the bed, then when I was done with the animation added the rest of the bedroom scene and just deleted one of the beds. I am not positive that was the problem but it's the only thing I can think of I did differently.
And as I said above by loading a bedroom scene with the proper lighting and deleting the toons in the scene, then importing the toons from the bedroom scene with the bad lighting, that fixed the problem. However doing it the reverse way did not. Any way thanks for your help. i will be relloking at the things you suggest when I have more time to see if I missed something.
I have found there is sometimes a problem loading images where the gamma is changed by daz studio 'automatically'.
I'd create 2 slightly different iris textures and render them with the same settings in 3delight, then load each one for the eyes, when I rendered, daz had automatically changed the gamma on one of the iris textures to 1.0 and left the other at 0.0 so I got one very bright iris and a dull iris. I honestly don't know what daz is doing with gamma, or whether it sees 0.0 or 1.0 as the 'base' gamma, or whether 0.0 is off. So check the gamma in the image editor for each scene, see if they are the same, or change a single image in the one scenes to 1.0 or 0.0 as a test.
It could be the floor height of your hdr sphere between scenes, if it's above your scene floor the scene floor won't cast a shadow on your figures and they will be lit up, if it's below your scene floor, the scene floor will cast a shadow on your figures. Try a quick render with and without the scene floor.
If you press ctrl-L you can see in the dark!
I don't have an answer to your problem though, unforunately. Do make sure that headlamps are disabled from all cameras though! That caused me endless headaches in the past.