Thanks, no good though. I get the same thing. I deleted every light from the level and started over Placing/Building/Running them one by one. It seems that every time I got to 5 lights I got these errors again. I even disabled the on/off switch and the dynamic increase/decrease of the light. I also noticed that if I create any light in the level higher than 1500 quants above 0 on the z axis I get this as well and it doesn't matter if I have 1, 2, 3 or more lights. I guess we are limited to 4 dynamic lights?