Open Access

Table 2

Comparison of incandescent, fluorescent, high-pressure sodium, and LED lamps

  Incandescent lamp Fluorescent lamp High-pressure sodium lamp LED lamps
Luminous efficacy (lm/W) 16 70-90 110-135 80-150
Color temperature (K) 2,400-2,900 3,800 1,900-2,800 4,500-6,000
Color rendering index 95-99 60-90 23 to 25 75-80
Life span (h) 1,000-2,000 8,000-15,000 20,000-28,000 50,000

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