Research Article
Design of Counter Beam Tunnel Lights for CIE 88 : 2004 Regulation in Threshold Zone
Table 1
The comparison of lighting performance between the initially designed new CBL and the new optimized CBL for the tunnel threshold zone.
| | Variable | Before optimization | After optimization | CIE standard |
| | Lav (cd/m2) | 121 (pass) | 123 (pass) | >105 | | 0.87 (pass) | 0.84 (pass) | >0.4 | | 0.98 (pass) | 0.97 (pass) | >0.6 | | 3.6% (pass) | 10.41% (pass) | <15% | | 0.26 (failed) | 1.19 (pass) | >0.6 |
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