Interior+Lighting

Interior Lighting Strategies:
Interior Restaurant, 3rd floor


 * Room Cavity Ratio (RCR)=1.7**
 * Floor Cavity Ratio (FCR)=.54**
 * Ceiling Cavity Ratio (CCR)=.36**

70% = Typical lighting industry ceiling reflectance
 * Ceiling **

 80% = Notional reflectance assumed where it is known that the reflectance factor is greater than 70%

 86% = RAL 9010 20% gloss ceiling 50% = Typical lighting industry wall reflectance
 * Wall **

 70% = Notional reflectance assumed where it is known that the reflectance factor is greater than 50%

 83% = Actual reflectance of Magnolia colored paint in matt (Dulux®) 20% = Typical industry floor reflectance
 * Floor **

 10% = Notional reflectance of a floor based on assumption that floor finishes are very dark

 30% = Actual reflectance of a light colored carpet



footcandles for a dinning area falls around 20 for restaurant **FC=20** illuminance E= (lamp lumens x CU)/area =8412(.57)/4206 = **illuminance E= 1.14** E=(lamp lumens x CU x LLF)/area = 4206=[8412(.57)LLF]/4206 = **LLF=1.75**
 * RCR=1.7 Coefficient of Utilization (CU)= .57**
 * 2X4 light florescent light fixture composed of 4 lamps that release 1800 lumens


 * Applying Findings:**

The spreadsheet shows the cavity ratio for the ceiling,room and floor as well as their effective reflectance. The number of fixtures needed to illuminate the space to get a a require 20 footcandles for the entire space to be illuminate evenly. The 4206 sq.ft area will take 12 fixtures approximately 19 feet off center to obtain the 20 footcandles for the entire space.

Showing the task lighting for a dinning table at the restaurant. The Ray of light is 9.5ft in distance and the light fixtures emitting 1800cd illuminates 20 footcandles. Showing the task lighting for a 3'6" food pick up counter with the light fixture directly above the counter therefore the beam angle and incidence angle is 0. The illumination of the fixture uses 25 footcandles.