How are street lights calculated?
Calculation: Required Streetlight Watt = (Lux per Sq. Meter X Surface Area of Street Light) / Lumen per Watt. Required Streetlight Watt = (6 X 1) / 20.
How big is a streetlight?
In most cases, street pole heights range from 9 to 14 feet. Ideally, the street light pole should provide sufficient light without there being an excessive glare. Although they help fight crime, street lights are meant to illuminate the way for pedestrians, cyclists, and motorists.
What is the standard distance between street lights?
The spacing between two light poles should be roughly 2.5–3 times the height of the pole. Shorter light poles should be installed at closer intervals. The density, speed of travel, and the type of light source along a corridor will also determine the ideal height and spacing.
How do you calculate the number of street light poles?
In UV-filtered halogen light (200 lux) and extension factor 3.5: The permissible illumination time (T) = 3.5 x 70 x 1000/200 = 1225 hours….(3) Calculation of the allowed illumination time:
| Extension Factor | |
|---|---|
| Lamp | Extension Factor |
| Incandescent lamps, | 2.7 to 3.2 |
| Halogen reflector lamps | 2.5 to 3.5 |
How many lumens is a standard street light?
Probably the most common is around 5000 lumens (at least in LED) used in residential areas. Collectors would be 7500-15000 depending on lanes, spacing, etc.
What is the diameter of a light post?
The pole shaft is made from aluminum alloy 6063-T6 with a wall thickness of 0.188 inches, has an overall mounting height of 30 feet, and maximum EPA rating of 0.7 at 110 mph. The butt diameter is 8 inches and tapers to 4.5 inches in diameter at the top.
Do street lights have meters?
Depending on where you live, most street lights already have their own meters. Some, like in Florida, have old street lights that don’t have meters. In that case, the old devices are charged using a formula that takes into consideration the usage time, wattage, and the price per kilowatt-hour.
How much concrete do I need for a lamp post?
About 16 inches of concrete will do the trick, with the post set 12 inches into it. You can also add to the stability of the lamp by digging a deeper hole and lining it with about 6 inches of gravel, says This Old House general contractor Tom Silva.
How do you calculate utilization factor for lighting?
Utilization Factor is Proportion of light reaching working plane to the light output of lamps. UF = Lumens received on Working Plan / Lumens output of luminaires. The lighting manufacturers’ catalogues give Utilization Factors for standard conditions.
Is street light a pole code?
HS Code used for Street light pole – Import
| Hs Code | Description | No of Shipments |
|---|---|---|
| 9405 | Lamps And Lighting Fittings Including Searchlights And Spotlights And Parts Thereof, Not Elsewhere Specified Or Include | |
| 94054090 | Other | 6 |
| 94059900 | Other | 3 |
| 94051090 | Other | 2 |
How is the illuminance of street lighting calculated?
Average Illuminance is calculated by Lumen method, where maintenance factor (MF) and coefficient of utilization (COU) are taken into account. n = number of lamps used in single luminaire = 1 for street lighting. Coefficient of Utilization (COU) is the ratio of utilized lumen to the installed lumen.
How to calculate spacing between street light poles?
Spacing between each Pole= (33200×0.18×0.8×0.9) / (5×11.5) Spacing between each Pole= 75 Foot. Space Height Ratio = 3. Which is less than define value. Spacing between each Pole is 75 Foot. Example: Calculate Streetlight Watt of each Luminaire of Street Light Pole having following Details,
What is coefficient of utilization in street lighting?
N = 1 for single sided street lighting design and N = 2 for double and staggered sided street lighting design, n = number of lamps used in single luminaire = 1 for street lighting. Coefficient of Utilization (COU) is the ratio of utilized lumen to the installed lumen.
What should the luminaire of a street light pole be?
Luminaire of each Pole: Wattage of Luminaries is 250 Watt, Lamp Out Put (LL) is 33200 Lumen, Required Lux Level (Eh) is 5 Lux, Coefficient of Utilization Factor (Cu) is 0.18, Lamp Lumen Depreciation Factor (LLD) is 0.8, Lamp Lumen Depreciation Factor (LLD) is 0.9. Space Height Ratio should be less than 3.