| very | 12 | degree |
| throughout the surface of the tube | 4 | location |
| for 15 years | 2 | temporal |
| tube → be → light | 32 |
| tube → emit → light | 7 |
| tube → have → light | 6 |
| tube → emit → visible light | 5 |
| tube → be exposed to → light | 4 |
| tube → produce → light | 3 |
| tube → emit → the light | 3 |
| negative | neutral | positive |
| 0.064 | 0.578 | 0.358 |
| Raw frequency | 60 |
| Normalized frequency | 0.558 |
| Modifier score | 0.500 |
| Perplexity | 408.419 |