Lighting design and calculations

Explore the differences between lumen and lux, installation types, lamp properties such as color temperature, ballast, and construction, and manual and dailux lighting calculations for normal, emergency, and safety lighting.

Define lumen as the light flux emitted by a lamp and lux as the light intensity per area, with examples and recommended lux ranges for offices and waiting areas.

Explore lighting units installation types—surface mount, flush mount, wall mount, pendant, track and landscape bollards—and how interior designers and electrical engineers assess lumen and lux to meet project needs.

Explore color rendering index and lamp properties across incandescent, halogen, mercury, sodium, metal halide, and fluorescent lamps, including lumens per watt, lifetimes, and typical applications.

Explain color temperature as the light appearance measured in Kelvin, with examples from candle flame to daylight, and show how lamp color codes reveal both Kelvin and color rendering.

Compare electronic and magnetic ballasts in fluorescent lighting, detailing how ballast regulates current, starts lamps, and affects efficiency, noise, power factor, and design flexibility.

Read a Philips lamp datasheet to understand luminous flux 2500 lumen, color temperature 6500 K, color rendering about 72%, life to 15,000 hours; note dimmable operation and voltage 103 V.

Learn to calculate the number of luminaires for a room, manually or with Dialux, using room index, utilization, reflectance, and maintenance factors.

Learn how reflectance factors from ceilings, walls, and work plans influence utilization factors via room index calculations. Use common reflectance values and tables to estimate lighting performance.

Explore how the maintenance factor in lighting design accounts for aging, reflectance changes in finishes and furniture, luminaire efficiency, enclosure transparency, and cleaning, with LED and non-LED scenarios.

Compute watts and lumens for two-lamp fixtures to meet 250 lux in a 25 m by 10 m room, using 85 lumen per watt, maintenance factor 0.6, and spacing rules.

Download and install Dialux, choose the evo or daylight distributions, and add Philips product database plugins to access luminaires in your lighting design projects.

Learn to set up a Dialux project, define rooms and luminaire layouts, perform 400 lux lighting calculations, and generate 2d and 3d plans with a PDF report.

Discover how to determine required lux levels for diverse spaces using CIBSE guidelines, with general and localized lighting for homes, offices, hotels, hospitals, and operating rooms.

Learn how IP ratings define solid and liquid protection for luminaires with two digits, x from 0 to 6 and y from 0 to 8.

Explore hotel lighting design concepts, including uplights, wall appliques, spotlights, and led strips, detailing lux targets and coordinating with architects to meet code and enhance spaces.

Explore the concept of design for hotel lighting, balancing front-of-house decor with back-of-house service areas, including corridor uplights, stair appliques, emergency lighting, exit signs, and room lighting.

Design landscape lighting for a beachfront hotel, using uplights on sand, palm tree accents, bollards along sidewalks, and lake and pool lighting connected to waterproof junction boxes and main panel.

Explore normal, emergency, and safety lighting systems, including self-contained or centralized classifications, with a case study and single-line diagram using transformer, generators, ATS, and UPS.

Explore the single line diagram for lighting systems, detailing normal, emergency, safety, and exit lighting, and how transformers, MDB, ATS, generator, UPS, and self-contained units interact.

Explore emergency lighting types—standby with generator supply and internal battery escape lighting—applied to corridors, open areas, and high-risk zones, detailing exit sign requirements, lux levels, and mounting distances.

Explain the need for emergency lighting and its key locations, ensuring safe movement, clear escape routes, and visibility of fire equipment with defined lux, battery, and response times.