Page 84 - GRIHA Manual Volume II - Introduction to National Rating System
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76 GrIha Manual: Volume 2
6.2 Compliance
The following documents have to be submitted.
6.2.1 Luminous efficacy of each type of lamp used in outdoor lighting.
Luminous efficacy (lm/W) = {lamp lumen output (lm)}/{lamp wattage (W) + ballast
power loss (W)}. The format is given in Table 6.2.
6.2.2 Outdoor lighting layout with manufacturers’ details of lamps, ballasts, luminaires, and
automatic controls. Wiring diagram and placement of automatic switch(es) for outdoor
lighting.
6.2.3 Demarcate solar lighting systems for outdoor lighting in outdoor-lighting layout and
give details of the same.
6.3 Appraisal (maximum points – 3)
6.3.1 Luminous efficacy of 100% of lamps used in outdoor lighting (Table 6.2) meets the
corresponding lamp luminous efficacy as mentioned in Table 6.1, as per clause 6.2.1
(1 point).
6.3.2 Automatic controls for 100% of outdoor lights, as per clause 6.1.2 (1 point).
6.3.3 Percentage of total outdoor lighting fixtures with solar lighting system, as per clause
6.1.3 (a minimum of 25% of total number or 15% of total connected load, whichever is
higher) (1 point).
Table 6.2 Format for luminous eficacy calculation
Luminaire Luminous
Luminaire Lamps Ballast wattage eficacy
Lumen Power (Lamp+ Minimum
Code Make Description Type Make output Wattage Type Make loss (W) ballast) Achieved recommended
Methodology
Step-by-step methodology for doing detailed analysis for GRIHA Criterion 6 is given below.
Step 1
luminous efficacy First step is to ensure that all light sources selected for exterior lighting purpose
have luminous efficacy figures higher than the minimum allowable values specified under GRIHA
(refer Table 6.2). Luminous efficacy of each type of lamp proposed in the lighting scheme can be
calculated using the specifications provided by the manufacturers (lamp lumen output, lamp
wattage and ballast power loss).
example
The following example shows how to check lamp specifications from the manufacturer’s cut sheets
for calculating luminous efficacy.
6.2 Compliance
The following documents have to be submitted.
6.2.1 Luminous efficacy of each type of lamp used in outdoor lighting.
Luminous efficacy (lm/W) = {lamp lumen output (lm)}/{lamp wattage (W) + ballast
power loss (W)}. The format is given in Table 6.2.
6.2.2 Outdoor lighting layout with manufacturers’ details of lamps, ballasts, luminaires, and
automatic controls. Wiring diagram and placement of automatic switch(es) for outdoor
lighting.
6.2.3 Demarcate solar lighting systems for outdoor lighting in outdoor-lighting layout and
give details of the same.
6.3 Appraisal (maximum points – 3)
6.3.1 Luminous efficacy of 100% of lamps used in outdoor lighting (Table 6.2) meets the
corresponding lamp luminous efficacy as mentioned in Table 6.1, as per clause 6.2.1
(1 point).
6.3.2 Automatic controls for 100% of outdoor lights, as per clause 6.1.2 (1 point).
6.3.3 Percentage of total outdoor lighting fixtures with solar lighting system, as per clause
6.1.3 (a minimum of 25% of total number or 15% of total connected load, whichever is
higher) (1 point).
Table 6.2 Format for luminous eficacy calculation
Luminaire Luminous
Luminaire Lamps Ballast wattage eficacy
Lumen Power (Lamp+ Minimum
Code Make Description Type Make output Wattage Type Make loss (W) ballast) Achieved recommended
Methodology
Step-by-step methodology for doing detailed analysis for GRIHA Criterion 6 is given below.
Step 1
luminous efficacy First step is to ensure that all light sources selected for exterior lighting purpose
have luminous efficacy figures higher than the minimum allowable values specified under GRIHA
(refer Table 6.2). Luminous efficacy of each type of lamp proposed in the lighting scheme can be
calculated using the specifications provided by the manufacturers (lamp lumen output, lamp
wattage and ballast power loss).
example
The following example shows how to check lamp specifications from the manufacturer’s cut sheets
for calculating luminous efficacy.
