| Share | Phrase |
|---|
| 23.13% | luminous [physical/chemical] intensity |
| 20.22% | luminous [physical/chemical] diode |
| 17.67% | luminous [physical/chemical] flame |
| 17.10% | luminous [physical/chemical] radiation |
| 15.92% | luminous [physical/chemical] power |
| 5.92% | luminous [physical/chemical] means |