Please edit your images according to my tips in this thread:
http://forum.lrtimelapse.com/Thread-i-tr...flickering
That way you should be able to get a match in brightness of different exposed images only by changing the exposure slider.

Hello! Congratulations for your work and dedication in making videos explaining step by step how to make the holy grail! I tried to do here, but after editing the 5 keyframes and save in Lightroom when I reload the LRtimelapse all information changes less exposure .... I do not know what happens, only the exposure does not change! Any tips? thank you very much

If you applied deflicker in a former step this could be a known bug in 1.8. I already fixed it and will release 1.9 in the next days.