The answer to 'cost to install recessed lighting in Illinois' is that the cost can vary widely depending on several factors. In general, you can expect to pay anywhere from $150 to $500 per recessed light fixture installed, with the average being around $300 per light.
The final cost will depend on the number of lights needed, the type of recessed lighting (standard vs. LED), the difficulty of the installation (accessibility of the ceiling, existing wiring, etc.), and whether any drywall or electrical work is required. It's always best to get quotes from local electrical contractors to get an accurate estimate for your specific project.