| Perfomance comparison of varios flame-based lamps | |||||||
| Type of light source |
Energy source |
Rate of con- sumption |
Total power w |
Lumi- nous flux, lm |
Luminous efficacy lm/W |
Color render- ing |
Equivalent number of lamps* |
| Candle | Wax | 5.50 g/h 7.20 g/h |
55 72 |
1 16 |
0.02 0.22 |
Good | 75 |
| Kerosene lantern |
Kerosene | 0.02 l/h 0.05 l/h |
200 488 |
10 100 |
0.05 0.21 |
Good | 12 |
| Pressure lamp | Kerosene | 0.06 l/h 0.08 l/h |
563 813 |
220 1300 |
0.39 1.60 |
Poor | 1 |
| Noorie | Kerosene | 0.05 l/h | 513 | 1250 | 2.44 | Poor | 1 |
| Carbide lamp | Carbide | 6.00 g/h 23.00 g/h |
34 132 |
50 250 |
1.46 1.90 |
Good | 5 |
| Gas lamp | LPG | 28.00 g/h 34.00 g/h |
350 425 |
330 1000 |
0.94 2.35 |
Poor | 1 |
| Biogas lamp | Biogas | 0.10 m3/h 0.20 m3/h |
693 1 385 |
330 1300 |
0.48 0.94 |
Poor | 1 |
| Examples of electric lamps for comparison | |||||||
| Incandescent lamp | 100w | 100 | 1200 | 12 | Good | 1 | |
| Halogen lamp | 25w | 25 | 500 | 20 | Good | 2 | |
| Fluoroscent | 13w | 13 | 585 | 45 | Good | 2 | |
| *The equivalent number of lamps is the number
of lamps required to pro- duce the same luminous flux as the reference 100w incandescent electrical bulb (i.e. 1 200 lm). Source: "Rural Lighting", by Louineau, Dicko, Fraenkel, Barlow & Bokalders, The Stockholm Environment Institute 1994. |
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