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Lighting advice

How much light a room needs, which colour temperature, how high to hang a lamp and which fitting fits. Explained with measurements and worked examples.

Calculators

Enter the measurements of your own room and see the result straight away, with a drawing.

Lumens per roomHow much light your room needs.Calculate Plan your spotsHow many spots, and how far apart.Calculate Pendant over the tableHow high, how big and how many lamps.Calculate Light colourThe right Kelvin for each room and time of day.Calculate LED strip and power supplyPower supply, current and voltage drop.Calculate Payback periodWhat LED saves you each year.Calculate

Lighting advice · 10 min read Bathroom lighting: IP ratings and zones in Belgium and the Netherlands Which IP rating does a light above a bath or shower need? The AREI volumes since 2025, the NEN 1010 zones, and good light at the mirror.

Lighting advice · 8 min read Bedroom lighting: bedside lamps, reading light and light for the evening Bedside lamps, reading light next to the bed and light for the wardrobe and the children’s room, with what research says about light in the hours before bed.

Lighting advice · 9 min read Choosing a colour temperature: which kelvin suits which room? What kelvin means, which colour temperature suits the living room, kitchen, bathroom and desk, and when dim-to-warm or tunable white is worth it. Lighting advice · 10 min read Choosing an LED strip: 12 or 24 volts, watts per metre, IP rating and the right power supply How many watts and lumens per metre, 12 or 24 volts, COB or SMD, which profile and which power supply: how to plan an LED strip that lights evenly and lasts. Lighting advice · 8 min read Colour rendering (CRI) explained: what Ra 80, Ra 90 and R9 mean What the colour rendering index measures, why Ra 80 is the minimum, when Ra 90 pays off and why you also check R9 for red in the kitchen and at the mirror.

Lighting advice · 8 min read Desk lighting for working from home: 500 lux without glare or reflections For working from home you want 500 lux on the desk, no glare and no reflections in the screen. How to combine a desk lamp, ceiling light and daylight.

Lighting advice · 10 min read Dimming LED bulbs: the right dimmer, and what to do about flickering or humming Trailing edge or leading edge, minimum load, flickering, afterglow and humming: how to choose a dimmer that really works with LED bulbs.

Lighting advice · 10 min read How many lumens do you need? Light levels per room, worked out Guide values in lux for living room, kitchen, bathroom and study, the rule for converting to lumens, and what ceiling height and wall colour change.

Lighting advice · 8 min read Kitchen lighting: worktop, kitchen island and under-cabinet lighting Licht.de asks for 500 to 650 lux on the worktop. How to light the worktop, island and cabinets without shadows, at the right height and with good colours.

Lighting advice · 10 min read Lamp bases explained: recognising E27, E14, GU10, G9 and the rest Which base does your bulb have? How to recognise E27, E14, GU10, GU5.3, G9, G4, GX53, R7s and G13, with the voltage, the pitfalls and the LED replacement.

Lighting advice · 9 min read Living room lighting: how to plan light in layers A 20 m² living room needs three to five light sources. How to combine general light, reading light and accents, and how to switch and dim them.

Lighting advice · 9 min read Outdoor lighting: IP rating, sensors and light that does not disturb neighbours or wildlife Outdoor lights need at least IP44, ground spotlights IP65 or IP67. How to choose facade, path and garden lighting, a sensor and a safe connection.

Lighting advice · 9 min read Pendant light above the dining table: height, size and number of lights Hang the bottom 60 to 75 cm above the tabletop. How to choose the diameter, the number of lights and the colour temperature for a round or a long table.

Lighting advice · 8 min read Planning spotlights: how many, at what spacing and with which beam angle How many recessed spotlights do you need, and how far apart and from the wall? Rules of thumb with beam angle, ceiling height, recess depth and insulation.

Lighting advice · 8 min read The energy label for light bulbs: classes A to G, EPREL and why a good LED bulb can be G Since September 2021, bulbs carry a label from A to G. How the class is calculated, what is in EPREL and why light fittings do not have a label.

Lighting advice · 9 min read Track lighting explained: 1-phase, 3-phase or 48 volt, and what fits what How a track system works, the difference between 1-phase, 3-phase and 48V tracks, which spotlights fit which track and how to plan and power a track.

Lighting advice · 7 min read What does LED really save? Consumption, payback time and lifespan worked out How much electricity and money an LED bulb saves compared with halogen or incandescent, with current power prices, worked examples and the L70 lifespan.