Indoor Lighting

  • Introduction

“The people who lighten the future are the ones who use energy efficiently.”


The first point to be considered in lighting is efficient use of energy. There are many factors which should be taken into account in indoor lighting such as the type of lighting, where, how and for whom it will be applied, light quality, lighting standard, vibration, harmony of light with colors, not straining the eyes, and the lightning not being monotonous. In industrial lighting, in the case that lighting level is unhealthy and insufficient, efficiency of the work carried out can drop or undesired work accidents may occur.

Correct lighting both enables employees to feel comfortable in the environment where they work and plays a major role in formation of a safe working environment. Everything you need in indoor lighting, which is one of the areas of service of Ersel Engineering, will be satisfied by our professional personnel team.

You can visit our web site in order to obtain information on the type of lightings you can choose before application.

You can see the Industrial Lighting Levels in the Table below;

Work class Minimum sizes of substances and other properties processed by workers
I. 0,2 mm
II. 0,2 mm - 1 mm
III. 1 mm - 10 mm
IV. 10 mm - 100 mm
V. 100 mm
VI. The largest volume of coarse materials


Work class Minimum lighting intensity permittedas luxury Recommended (preferred)
I. 200 280
II. 150 200
III. 100 150
IV. 60 100
V. 40 60
VI. 20 40


Work class Average lighting intensity recommended (as luxury) Average lighting intensity recommended (as luxury) Minimum lighting intensity permitted in work place (as luxury) Minimum lighting intensity permitted in work place (as luxury)
  Combined lighting
(General + local)
Only general lighting Combined lighting
(General + local)
Only general lighting
I. Min. 1000 Max. 300 500 300
II. 300 - 1000 150 - 300 300 125
III. 150 - 300 80 - 150 75 50
IV. 50 - 100 40 - 80 40 20
V. - 20 - 40 - 10
VI. - 10 - 20 - 5


Type of vision The minimum lighting intensity on the spot of view LUX* Typical Examples
General vision 20 Ensuring secure walking (for instance, hallways which are not walked through frequently).
General vision 100 Boiler room (the activities of coaling and ash removal), bulk material storerooms, warehouses and dressing rooms
Simple, rough 150 Rough works and sorting works carried out on work tables and counters, general review and counting of stored materials and assembly of heavy machines.
Quite critical 300 Moderately hard works on work tables and counters, also assembly and checking works of the same degree, general office works, reading, writing and recording works..
Critical 700 Sensitive works on work tables and counters, assembly and checking works of the same degree, very sensitive painting works, and sewing of dark fabrics.
Very critical 1500 Assembly and checking of sensitive parts, tool and gage manufacture and checking, sensitive grinding works
Very hard or important 3000 Watch manufacture and repair and very sensitive similar works.




Electrical Installations

ARTICLE 23: Lighting

Article 23- All installation sections should be lightened well by day light as much as possible. In addition, electrical lighting installation with sufficient and regular distribution should be provided for these sections. In cases where electrical lighting installation cannot be used, special lighting installations should be established to be able to walk around securely in maneuver and inspection sites and carry out the required works.

The lighting installation established should ensure a minimum lighting level of 250 lux in High Voltage Cells and Low Voltage panel rooms and minimum lighting level of 150 lux in transformer rooms. If there is a battery-powered emergency lamp at sufficient numbers (at least one) in each room in transformer centers or accumulator with sufficient capacity, battery-powered lighting lamps should be available. The lamps concerned should be made to burn automatically in case of power cut in places of constant human existence. In other places, lamps should burn manually through an appropriate action.