News - E-LITE LED STREET LIGHT DESIGN & SOLUTION

2021-2022 GOVERNMENT OF LED STREET LIGHT TENDER

Road lighting not only brings significant safety benefits, but it also takes a big chunk out of the budget for infrastructure operations. with the social development, the roads lighting is included in street lighting/crossroads lighting/highway lighting/square lighting/high pole lighting/walkway lighting and so on.

Since 2021, E-LITE company actively participated in the Middle East of Government road bidding project and competed with international brand of companies(Like, GE,Philips, Schreder). From road simulation to product development, product certification, and continuous sample testing, finally with qualified street lights satisfied to Kuwaiti government and contractors. Eventually we won the projects.

Project Summary: THE MIDDLE EAST OF LED STREET LIGHT TENDER

Products:12M & 10M & 8M & 6M LIGHT POLES FOR LED STREET LIGHTING LUMINAIRES

First Step:

220W / 120W / 70W / 50W STREET LUMINNAIRES Total 70,000pcs

Second Step:

220W / 120W / 70W / 50W STREET LUMINNAIRES Total 100,000pcs

LED:PHILIPS LUMILEDS 5050, INVENTRONICS DRIVER, EFFICACY 150LM/W

WARRANTY: 10 YEARS WARRANTY.

CERTIFICATE: ETL DLC CB CE ROHS LM84 TM-21 LM79 SALT SPRAY 3G VIBRATION...

Key Factors to Consider in the Street Lighting Design

Main factors which we should pay attention to?

Street lighting evaluation indicators include average road luminance Lav (road average illuminance, road minimum illuminance), brightness uniformity, longitudinal uniformity, glare, environmental ratio SR, Color Rendering Index, and visual inducement. So these are the points we need to pay attention to when doing street lighting design.

Average Road Luminance Lav in Cd/m

Road Luminance is a measure of the visibility of the road. It is the most important factor affecting whether the obstacle can be seen, and it is based on the principle of illuminating the road enough to see the outline of the obstacle. Brightness (Road Luminance) depends on the light distribution of the luminaire, the lumen output of the luminaire, the installation design of the street lighting, and the reflective properties of the road surface. The higher the brightness level, the better the lighting effect. According to lighting-class standards, Lav is in the range between 0.3 and 2.0 Cd/m2.

Uniformity

Uniformity is an index to measure the uniformity of light distribution on the road, which can be expressed as overall uniformity (U0) and longitudinal uniformity (UI).

Street lighting facilities must determine the allowable difference between the minimum brightness and the average brightness on the road, that is, the overall brightness uniformity, which is defined as the ratio of the minimum brightness to the average brightness on the road. Good overall uniformity ensures that all points and objects on the road are sufficiently illuminated for the driver to see. The Uo value accepted by the road lighting industry is 0.40.

Glare

Glare is the blinding sensation that occurs when the brightness of light exceeds the level of adaptation of the human eye to light. It can cause discomfort and reduce road visibility. It is measured in Threshold Increment (TI), which is the percentage increase in brightness required to compensate for the effects of glare (ie, to make the road equally visible without glare). The industry standard for the glare in street lighting is between 10% and 20%.

Road Average Illuminance, Road Minimum Illuminance, and Vertical Illuminance

The average value of the illuminance of each point is measured or calculated at the preset points on the road according to the relevant regulations of CIE. The lighting requirements of motor vehicle lanes are generally based on brightness, but the lighting requirements of sidewalks are mainly based on road illuminance. It depends on the light distribution of the lamps, the lumen output of the lamps, and the installation design of the street lighting, but it has little to do with the reflection characteristics of the road. Illuminance uniformity UE (Lmin/Lav) also needs attention in sidewalk lighting, it is the ratio of the minimum illuminance to the average illuminance on the road. To provide for uniformity the actual value of the maintained average illuminance may not exceed 1.5 times the value indicated for the class.

Surround ratio (SR)

The ratio of the average horizontal illuminance in the 5 meters wide area outside the roadway to the average horizontal illuminance on the adjacent 5 meters wide roadway. Road lighting should not only illuminate the road, but also the adjacent area so that motorists can see surrounding objects and anticipate possible road obstacles (eg, pedestrians about to step onto the road). SR is the visibility of the road perimeter relative to the main road itself. According to lighting industry standards, the SR should be at least 0.50, as this is ideal and sufficient for proper eye accommodation.