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Abby Lighting
Abby Lighting

For over three generations, Abby Lighting has been one of India's leading architectural lighting manufacturers, designing and manufacturing premium architectural and outdoor lighting entirely in-house. From concept and engineering to precision manufacturing and testing, every luminaire is built for consistency, performance and long-term reliability, making Abby Lighting the trusted partner for architects, interior designers and consultants across residential, commercial and hospitality projects.

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Professional Ambient Lighting Calculator

Project Inputs

Choose whether you want to enter the room dimensions in feet or metres.
Used to determine the recommended illumination level for the space.
Choose the overall brightness and mood you want the room to have.
Enter the internal length of the room in your selected measurement unit.
Enter the internal width of the room in your selected measurement unit.
Measure from the finished floor to the ceiling in your selected measurement unit.
Select the option that most closely matches the room's ceiling construction.
Lighter surfaces reflect more light, while darker surfaces absorb more light.
Consider the amount of daylight normally available when the room is in use.
Accounts for light reduction caused by fixture ageing, dust and maintenance conditions. Default value: 0.80.
Estimates how much of the fixture's emitted light effectively reaches useful room surfaces. Default value: 0.65.
Enter the lumen output of one proposed light fixture, as shown on its specification.

Recommended
Fixture Quantity:RECOMMENDED FIXTURE COUNT10 × 850 lm

Calculation SummaryBased on

Total Room Area:180.0 sq ft | 16.72 sq m
Recommended Light Level:250 lx
Total Ambient Lumens Required:8040 lm
Suggested Fixture Spacing:4.2 ft on centre (starting point)
Suggested Beam Angle:36°
Suggested Colour Temperature:3000 K
Minimum Recommended CRI:≥90

Important Note:

This tool estimates ambient lighting only. Decorative pendants, cove lighting, wall washing, bedside lamps, artwork lighting, beam angles, glare control, CRI, furniture layouts and lighting scenes require professional design. Always validate the final fixture layout, beam angles, spacing, glare control and layered lighting before specification.

Black architectural spotlight casting a focused beam

Find the right Lights for your space

Explore Abby Lighting fixtures suited to your lighting requirements.

Legend & Design Notes

Target illumination on the working plane measured in lumens per square metre (lx).

Total light emitted by a luminaire. Fixture quantities are based on this value.

Compensates for lumen depreciation due to ageing, dust and maintenance. Residential default: 0.80.

Represents how efficiently emitted light reaches useful surfaces.

The calculator recommends a suitable colour temperature based on ambience. CCT is not used as a primary engineering multiplier because lumen output is already specified by the fixture manufacturer.