{"id":46256,"date":"2025-06-23T03:26:49","date_gmt":"2025-06-23T03:26:49","guid":{"rendered":"https:\/\/luxmanlight.com\/?p=46256"},"modified":"2025-06-23T03:31:24","modified_gmt":"2025-06-23T03:31:24","slug":"street-light-distribution-analysis-how-to-meet-your-road-lighting-standards","status":"publish","type":"post","link":"https:\/\/luxmanlight.com\/th\/street-light-distribution-analysis-how-to-meet-your-road-lighting-standards\/","title":{"rendered":"Street Light Distribution Analysis – How to Meet Your Road Lighting Standards!"},"content":{"rendered":"

This is a requirement for road lamp design.<\/a><\/p>\n

\n\n\n\n\n\n\n
Item Name<\/th>\nRoute Code<\/th>\nRoad Width (m)<\/th>\nSurface Type<\/th>\nLamp Configuration<\/th>\nNumber of Lamps<\/th>\nLamp Height (m)<\/th>\nLamp Spacing (m)<\/th>\nAngle (\u00b0)<\/th>\nLength of Lamp Arm (m)<\/th>\nDistance Between Lamp and Road (m)<\/th>\nIlluminance (1m)<\/th>\n<\/tr>\n<\/thead>\n
Route 1<\/td>\nM5<\/td>\n7m<\/td>\nCIE C2 (Calculated Humidity)<\/td>\nUnilateral Lamp<\/td>\n0.8<\/td>\n12<\/td>\n40<\/td>\n0<\/td>\n0<\/td>\n0.75<\/td>\n8000<\/td>\n<\/tr>\n
Route 2<\/td>\nM3<\/td>\n14m<\/td>\nCIE C2 (Calculated Humidity)<\/td>\nBilateral Lamp<\/td>\n0.8<\/td>\n10<\/td>\n40<\/td>\n0<\/td>\n0<\/td>\n0.75<\/td>\n8000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Now, based on the above conditions, we need to select the light distribution for the lamps and verify it.<\/p>\n

First, let’s analyze the road conditions.<\/p>\n

For Route 1, with a road width of 7m, this should be a two-lane road with unilateral lamp arrangements, pole spacing of 40m, and pole height of 7.5m.<\/p>\n

For Route 2, with a road width of 14m, this should be a four-lane, bidirectional road with bilateral lamp arrangements, pole spacing of 40m, and pole height of 9m.<\/p>\n

Based on these road conditions, we proceed with the selection of light distribution, referencing IESNA’s categorization of street lamps.<\/p>\n

\"IESNA<\/p>\n

\u2191 IESNA Street Lamp Classification, North American Lighting Manual 10th Edition<\/p>\n

For one to two-lane roads, we typically choose Type II street lamps. Type I is suitable for paths and sidewalks, while Type III applies to main highways.<\/p>\n

We can refer to the following rules based on road width.<\/p>\n

\"Road<\/p>\n

As per the above table, we should select the Type II L distribution. However, considering the distance of 0.75m between the lamp and the road as specified in the road conditions, we will adjust our pole spacing slightly and choose Type II M or S distribution.<\/p>\n

\"Type<\/p>\n

Let\u2019s begin testing Route 1 by setting the road conditions in DIALux evo (we avoid DIALux4.13 as it does not support the EN13201:2015 standard necessary for selecting the new standard).<\/p>\n

\"DIALux<\/p>\n

Here, we need to select the surface type as CIE C2 and check the option for calculating wet road surfaces, choosing W1.<\/p>\n

The CIE C2 surface corresponds to asphalt, similar to the reflectivity of our traditional R3. Further explanation of the codes is provided below:<\/p>\n

\"CIE<\/p>\n

With the road conditions set, we can select the light distribution for verification calculations.<\/p>\n

We are going to select a Type II S distribution for verification.<\/p>\n

\"Type<\/p>\n

Set the lamp arrangement conditions and configure the lamp luminous flux to the required 5500lm.<\/p>\n

\"Lamp<\/p>\n

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