Review Article
Solar Lighting Technologies for Highway Green Rest Areas in China: Energy Saving Economic and Environmental Evaluation
Table 4
The comparison of high voltage sodium lamp and solar LED lamp within the life cycle of 25 years.
| | Comparison items | High voltage sodium lamp |
Solar LED lamp |
| | Cost for one lamp (RMB) | 1000 | 3500 | | Number of lamps | 24 | 24 | | Service life (thousand hours) | 12 | 90~100 | | Lighting power for one lamp (W) | 200 | 100 | | Total power consumption WT (103 kW·h) | 438 | 219 | | Total electricity bills (thousand RMB) | 262.8 | 131.4 | | Replacing times | 8 | 0 | | Original invest cost (thousand RMB) | 230.4 | 86.4 | | Maintenance cost (thousand RMB) | 5.5 | 3.5 | | Total cost (thousand RMB) | 498.7 | 221.3 | | Total cost saving (thousand RMB) | 277.4 | | Total cost saving (thousand dollars) | 44.7 |
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