Cost Benefits

Analysis report on LED high-power application

Comparison of LED and HPS on a main road.

Specification	LED	High Pressure Sodium (HPS)
Power Electric (Hz)	AC110 ~ 250V	AC 220V
Lamp Source	LED Lighting	High Pressure Sodium (HPS)
Power of the Lamp	120W Main Road	400W Main Road
Power of the Lamp	100W Vice Road	250W Vice Road
Cable Lines	VV22-4*16 mm2	VV22-4*35 mm2
Transformer	80KVA	80KVA
Controller box	Stainless steel (electrical accessories inside)	Stainless steel (energy-saving devices needed)
Lamps working temperature (°C)	< 70°C	150°C ~ 300°C
Color temperature (K)	5000~6000K Sun Light	1950~2250K Yellow
Light attenuation	< 10%	< 40%
Lamps Lifespan	Near 30,000 (H)	Near 2,000 (H)
Reactive Loss	Nearly none	Yes
Vertical illuminance from 12m high pole	22lux	> 26lux
Average illuminance from 12m high pole	14lux	> 16lux
Uniformity of illuminance	0.43	> 0.40
Scope of illuminance	Radius more than 15 meters	Radius more than 15 meters
Anti-glare	Episcope type, beam angle with max lumen is below 60°. Good.	Episcope type, beam angle with max lumen is above 60°.
Penetrability	High in haze-penetrating	Low in haze-penetrating
High pressure accessories etc	-	-
Fire-protection Rating	94V-0	94V-0
Colour Rendering Index	68 - 85Ra	25 - 60Ra
Restart delay time	1 Second	5 - 10 Minutes

Case Study

Photos at night:

12m pole, 25-32meters inter pole distance, 4-car-drive road, 3km long. (120w) white and (100w) warm white.

Specification	LED	High Pressure Sodium (HPS)
Cable Cost	$9.33/M×4000M = $37320	$13.4/M×4000M=53600 RMB
Transformer	80KVA 1 piece	80KVA 2 pieces
Transformer	$3362	$3362/PC×2PC = $6724
Controller Box	1 piece	2 pieces
Controller Box	$633.8	$2535.2/PC×2PC = $5070.4
Power of the Lamp	120W (Main Rd)	400W (Main Rd)
Power of the Lamp	100W (Vice Rd)	250W (Vice Rd)
Power Consumed	135W, 110W	510W, 310W
Power Consumed	110W/pc×142pcs = 15620W (Vice Rd) 135W/pc×186pcs = 25110W (Main Rd)	310W/pc×142pc = 44020W (Vice Rd) 510W/pc×186pcs = 94860W (Main Rd)
Daily Power Consumption	15620W/hr×6hr = 93,720W = 93.72 kWh (Vice Rd) 25110W/hr×10hr = 251,100W = 251.1 kWh(Main Rd)	44020/hr×6hr = 264,120W = 264.12 kWh (Vice Rd) 94860W/hr×10hr = 948,600W = 948.6 kWh (Main Rd)
Total Daily Power Consumption	93.72 kWh+251.1 kWh = 344.82 kWh	264.12 kWh+948.6kWh = 1212.72 kWh
Total Electricity Charges - Yearly (0.85RMB/kWh)	344.82kWh×$0.12/kWh×365 Days = $15103.116 per year	1212.72kWh×$0.12/kWh×365 Days = $53117.136 per year
Lifespan	30,000 Hours (8 years)	2,000 Hours(half year¹)

Note: The unit cable price is based on the current price of: VV22-4*16 price: $9.33/M,VV22-4*25 is $13.4/M

And the electricity cost is based on the standard price: $0.12/kWh

¹For regular high pressure sodium lamp, you need to replace them every half year.

Investment Repayment Analysis (8 years)

Cost	LED ($)	HPS ($)
Cost of Pole	57936²	57936
Cost of Lamp	111697.7³	16742⁴
Cost of equipment installed⁵	41330.99	65315.49
Cost of maintenance per year	0	1126.761
Electricity cost per year	15103.12	53117.14

Year	Total Spending (US $)
0	210,965⁶	139,994
1	226,068⁷	210,979⁸
2	241,171	289,707
3	256,274	386,435
4	271,377	474,163
5	286,480	561,891
6	301,583	649,619
7	316,687	727,347
8	331,790	825,075

² 142 poles, at price $408/pcs

³ Led UK item priced at $325.52/pcs and at a price of $352.01 (pricelist 7.35)

⁴ 400w at price $61/pcs, 250w at price $38/pcs. These are the standard bulk buy price for regular high pressure sodium lamp in China.

⁵ This include the cost of cable, transformer and controller box.

⁶ This including the cost of pole, lamp and equipment

⁷ This including last year's spending and electricity cost for one year. (same after)

⁸ This including last year's spending, electricity cost for one year, maintenance cost, and the cost of replacing the lamp. (same after)

Repayment period: 2 Years

Conclusion

With LED lighting, you start to saving money in 2nd year. After 8 years, you can save $0.5million USD.

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