| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | Saudi Lighting Company, Ltd. | Light engineering | 2 |
| 2 | SBLD Studio | Light engineering | 3 |
| 3 | Schlotfeldt Licht GmbH | Light engineering | 2 |
| 4 | Schuler Shook | Light engineering | 27 |
| 5 | Schuler Shook | Light engineering | 22 |
| 6 | Schwinghammer Lighting, LLC | Light engineering | 1 |
| 7 | Scott Oldner Lighting Design, LLC | Light engineering | 2 |
| 8 | Self-Powered Lighting, Inc. | Light engineering | 1 |
| 9 | SESCO Lighting, Inc. | Light engineering | 15 |
| 10 | Shaflik Group | Light engineering | 2 |
| 11 | Shaper Lighting | Light engineering | 2 |
| 12 | Sil Lux SRL | Light engineering | 0 |
| 13 | Siteco | Light engineering | 7 |
| 14 | Sola Associates | Light engineering | 9 |
| 15 | Solar A/S | Light engineering | 1 |
| 16 | Speeg & Michel | Light engineering | 2 |
| 17 | Speirs and Major Associates | Light engineering | 33 |
| 18 | Stokkan Lys AS | Light engineering | 1 |
| 19 | Studio A19 | Light engineering | 2 |
| 20 | Studio K1 | Light engineering | 1 |