| Title | Country | State / Province | City | Phone | Email Sort ascending |
|---|---|---|---|---|---|
| Peter Basso Associates | United States | Michigan | Ann Arbor | 734 913-4749 | |
| Certified Lighting Design | United States | California | Chatsworth | 818 886-6048 | |
| J & M Associates | United States | Maine | Kennebunkport | 207 967-5223 | |
| L Design Studio | United States | New York | New York | 212 686-5400 | |
| Markus Earley Lighting Design | United States | Rhode Island | Providence | 401 245-5677 | |
| CD+M Lighting Design Group | United States | California | Glendale | 818 241-2601 | |
| Millies Engineering Group | United States | Indiana | Munster | 219 924-8400 | |
| Formations Inc. | United States | Oregon | Lake Oswego | 503 675-2400 | |
| MJS Lighting Consultant | United States | Texas | Houston | 713 850-1488 | |
| Spector Group | United States | New York | New York | 212 572-4810 | |
| Davis Crossfield Assoc | United States | New York | New York | 212 927-8822 | |
| Light Options | United States | New York | New York | ||
| Creative Lighting Design & Eng. | United States | Wisconsin | Germantown | 262 242-4432 | |
| Landry & Bogan | United States | California | Mountain View | 650 969-5195 | |
| LightWire | United States | Washington | Seattle | 206 292-8177 | |
| HGA | United States | Minnesota | Minneapolis | 612 758-4000 | |
| JS Nolan + Associates | United States | California | San Francisco | 415 618-0101 | |
| PHA Lighting Design | United States | Georgia | Atlanta | 404 892-0176 | |
| Hefferan Partnership Lighting Design | United States | Colorado | Boulder | 303 447-3566 | |
| Flack and Kurtz Lighting Group | United States | California | San Francisco | 415 398-3833 | |
| Ewing Cole | United States | District of Columbia | Washington | 202 467-1500 | |
| Lighting Design Alliance | United States | Illinois | Chicago | 312 441-1426 | |
| The Lighting Practice | United States | Pennsylvania | Philadelphia | 215 238-1644 | |
| Ericson Lighting Design | United States | California | San Diego | 619 291-4423 | |
| Layman Design | United States | Illinois | Skokie | 847 637-5221 | |
| Patrick B. Quigley & Assoc, Inc. | United States | California | Torrance | 310 533-6064 | |
| Deborah Berke & Partners | United States | New York | New York | 212 229-9211 | |
| The Mintz Ltg. Group, Inc. | United States | New Jersey | Newark | 973 286-1100 | |
| Creative Designs in Lighting | United States | Arizona | Phoenix | 602 248-7822 | |
| MSA Engineering Inc | United States | Nevada | Las Vegas | 702 896-1100 |