LED AVIATION OBSTRUCTION LIGHTS - THE ECONOMICAL ALTERNATIVE Economise on energy, replacement, and maintenance costs with the Binay LED-based Aviation Ob-struction Light (AOL) BINAY LED (Light Emitting Diode) Aviation Obstruction Lights are a "fit-and-forget" solution that eliminate the cost, hazard, and aggravation of frequent replacement - normally an inherent feature of the conventional filament bulb or neon spiral units used in this application. Although at first glance the price seems rather high, when one considers that the life is 100 times that of a filament lamp (which has a nominal life of only 1000 hours provided it is properly manufactured), the aspect of econ-omy is brought into the correct perspective. Of greater importance is the economies effected by the elimination of recur-ring maintenance costs, as well as the saving in power consumption. A COMPARATIVE COST-CALCULATION of the savings effected by our AOL as compared to a standard light using a 220V/100W filament bulb is given below:

		Conventional AOL with 100W filament bulb	Conventional AOL with neon spiral	Binay LED Aviation Obstruction Light
1.	Replacement Cost	Rs.10.00 (for bulb)	Rs.4,500.00	Rs.10,500.00
2.	Life	1000 hours	5000 hours (However, the transformer fails on an average of once a year, generally due to water leakage)	100,000 hours (22 years, @12 hours of op-eration per day)
3.	Replacements per year	4.38	1	0.0438
4.	Capital cost per year	Rs. 43.80	Rs. 4500.00	Rs. 459.90
5.	Annual costs for replace-ment/maintenance activities	Rs. 8.760.00 (@Rs. 2000 per instance)*	Rs. 2000	Rs. 0.00
6.	Wattage	100 W	80 VA	15 W
7.	Units of Electricity (KwH) con-sumed/year	438 KwH	350 KwH	65.7 KwH
8.	Annual cost of above electricity @Rs. 4.00 per unit	Rs. 1,752.00	Rs.1,401.60	Rs. 262.80
9.	Total cost per year (4 + 5 + 8)	Rs. 10555.80	Rs.7,901.44	Rs. 722.70
TOTAL AVERAGE YEARLY SAVINGS EFFECTED OVER FILAMENT BULB AOL: Rs. 9,833.10 TOTAL AVERAGE YEARLY SAVINGS EFFECTED OVER NEON SPIRAL AOL: Rs. 7178.74

*Representative (average) cost, as evidenced at various installations throughout the country - includes cost of hiring an external contractor and in-suring the operator for carrying out dangerous maintenance work at a height. As such, it is easily seen that the cost of the BINAY LED Aviation Obstruction Light is recovered within a short period after installation. A further consideration lies in the fact that our LED AOL offers high reliability of operation. The high reliability is basically due to the solid-state nature of the LED, which also lends it vibration-resistant and shock-proof properties in contrast to the fragil-ity of conventional filament bulbs. If the LED circuit is properly designed, the diode chip (in the LED) will not be over-loaded, and as such the BINAY LED Obstruction Light can withstand a voltage variation of ± 25% without any detrimental effects. The reliability of the BINAY LED Aviation Obstruction Light is further enhanced due to the fact that multiple LED circuits are provided in the unit, giving it fail-safe characteristics.