| Description | Incandescent | CFL | LED |
|---|---|---|---|
| Light Quantity | 1 PCS | 1 PCS | 1 PCS |
| Life span of each bulb | 12,00 hours | 6,000 hours | 56,000 hours |
| Watts per bulb | 100 Watt | 20 Watt | 5 Watt |
| Cost per bulb | 50.00 TK | 2,300.00 TK | 2,300.00 TK |
| KWH of electricity used over 56,000 hours | 100 Watt | 20 Watt | 5 Watt |
| Cost of electricity (@13 per KWH) | 100 Watt | 20 Watt | 5 Watt |
| Bulbs required for 56,000 hours of use | 46 PCS | 9 PCS | 1 PCS |
| Bulls Expense | 2,300.00 TK | 2,250.00 TK | 350.00 TK |
| Total Cost for 56,000 hours | 75,100.00 TK | 16,810.00 TK | 3,990.00 TK |