| Title | Country | State / Province | City | Phone | Email Sort descending |
|---|---|---|---|---|---|
| Spector, Knapp and Baughman | United States | District of Columbia | Washington | 202 332-2434 | |
| Kling-Lindquist | United States | Pennsylvania | Philadelphia | 215 569-6141 | |
| Illuminart | United States | Michigan | Ypsilanti | 734 482-6066 | |
| Space | United States | New York | New York | 212 840-1818 | |
| Garrison/Lull Inc. | United States | New Jersey | Princeton Jct | 609 259-8050 | |
| Frederick Fisher & Partners | United States | California | Los Angeles | 310 820-6680 | |
| Reese Engineering | United States | Pennsylvania | State College | 814 234-2548 | |
| Levy Lighting Incorporated | United States | New York | New York | 212 925-4640 | |
| US Lighting Consultants | United States | New York | New York | 212 673-3210 | |
| Interface Engineering | United States | Oregon | Portland | 503 382-2266 | |
| Robert Singer & Associates, Inc. | United States | Colorado | Aspen | 970 963-5692 | |
| StudioK1 | United States | California | Santa Ana | 714 668-4200 | |
| Luminosity Architectural Lighting Design | United States | Colorado | Mountain Village | 970 729-8892 | |
| Croxton Collaborative Arch | United States | New York | New York | 212 683-1998 | |
| Gabellini Associates PC | United States | New York | New York | 212 388-1700 | |
| Brandston Partnership Inc. | United States | New York | New York | 212 924-4050 | |
| Renfro Design Group, Inc. | United States | New York | New York | 212 229-9990 | |
| Lighting Matters Inc | United States | Minnesota | Minneapolis | 612 341-2100 | |
| Schafer Associates | United States | Illinois | Oakbrook Terrace | 708 932-8787 | |
| Brinjac Engineering | United States | Pennsylvania | Harrisburg | 717 233-4502 | |
| Cambridge Seven Associates | United States | Massachusetts | Cambridge | 617 492-7000 | |
| The Lighting Studio | United States | Colorado | Denver | 303 595-0900 | |
| Becky Bowen Lighting Design | United States | Texas | Houston | 713 861-8122 | |
| Horton Lees Brogden Lighting Design | United States | California | San Francisco | 415 348-8273 | |
| Reese Engineering | United States | Illinois | Chicago | ||
| GPW & Assoc., LLC | United States | Kansas | Lawrence | 785 865-2332 | |
| Visual Terrain | United States | Illinois | Evergreen Park | 1-708-907-5958 | |
| Furman & Furman | United States | New York | New York | 212 292-2800 | |
| Echeverria Design Group | United States | Florida | Coral Gables | 305 444-0505 | |
| FRCH Design Worldwide | United States | Ohio | Cincinnati | 513 241-3000 |