Home / Fundamentals / Direct and indirect light: shadow and uniformity
Direct and indirect light: shadow and uniformity
Before choosing any fitting, ask yourself: do I want shadows or not? Direct light models objects and creates shadow; indirect light softens everything and removes it. Knowing when you want each is half of the design.
A lesson from the sky
Nature gives us three conditions: a clear sun with sharp shadows, strong modelling and high glare; a fully overcast sky with uniform, shadowless, glare-free light that makes objects look flat; and a partly cloudy sky with soft shadows that reveal form without hiding detail. Artificial lighting recreates these three conditions with fittings.
Directed direct light
Fittings with a reflector that send light straight down, such as a recessed downlight.
- High energy efficiency.
- Clear shadows and good modelling of objects.
- The ceiling and upper walls stay darker, so the room can look less lit than it really is.
- Not much affected by wall colours.
Diffused direct light
Fittings with an opal or prismatic diffuser that spread light in wider directions.
- Softer shadows; the diffuser acts like a cloud.
- Brighter walls and ceiling.
- Glare from the fitting itself can be higher, because the whole thing glows.
Indirect light
Light is aimed at the ceiling or a wall, then reflected back into the room: concealed lighting, a Wall Washer, or pendants that throw light upwards.
- Almost no glare if well designed, and no harsh shadows.
- A lit ceiling makes the room feel taller; a lit wall makes it feel wider.
- It is less efficient and depends heavily on the surface colour; a dark ceiling swallows the light.
- On its own it makes the space flat, so it is blended with direct light.
When to want shadow and when to avoid it
| Space | Shadow | Why |
|---|---|---|
| Artworks, sculptures and stone | Wanted | Shadow reveals three-dimensional form and texture |
| Majlis and paintings | Moderate | Modelling with comfort |
| Mirror, make-up and shaving | Not wanted | Shadow hides facial detail |
| Kitchen worktop | Not wanted | Your hand's shadow covers what you are working on |
| Desk and reading | Very light | Visual comfort for hours |
Uniformity
Uniformity is how close the light levels are across a space. High uniformity is needed in work areas and on the kitchen worktop, while deliberately low uniformity is what creates atmosphere in the majlis and in restaurants. The problem is not non-uniformity itself, but unintended non-uniformity: bright and dark patches that nobody planned.
Mixed lighting
Most good homes combine the two: indirect concealed lighting that fills the space softly, and directed fittings that provide accent and modelling. That way you get the third sky condition: soft shadows that reveal form without hiding anything.
Related mistakes and comparisons
Common mistakeThe facade-lighting mistake of mounting flush to the wall
“Want your facade light to throw a stunning beam? Don't mount it flush against the wall!”
- The problem
- Mounting wall lights flush against the wall creates a harsh, very distracting Hotspot that spoils the facade.
- Technical explanation
- Moving the fitting slightly away from the wall and choosing the correct aiming angle gives a long, ideal beam that highlights the villa's height up to 16 m.
- The result
- A facade that catches the eye of the whole neighbourhood, at low cost and with smart installation.
Common mistakeDotted light (Dots) on shelves
“You made luxurious marble shelves, and the strip's reflection shows up as dots? There goes the luxury!”
- The problem
- Installing a standard LED strip above glossy surfaces (marble or mirrors), which reflects the LED dots and looks cheap.
- Technical explanation
- Glossy surfaces need either a dot-free strip (COB LED) or an aluminium profile with a Diffuser that hides the dots completely.
- The result
- A smooth, continuous line of light that feels refined and luxurious.
Common mistakeOverdoing outdoor lighting (Floodlights)
“Installed stadium floodlights on your villa facade? You haven't lit it up, you've washed out its features!”
- The problem
- Flooding the facade with wide light erases the architectural details and creates light pollution.
- Technical explanation
- Highlighting a facade needs a well-planned layout of upward and downward Spotlights with narrow beams to create “contrast” between light and shadow, because shadow is what reveals the beauty.
- The result
- A palace-like facade with a far smaller electricity and installation budget.
Common mistakeAiming light at glass and mirrors
“Got a spotlight hitting the windows at night? You're blinding your guests!”
- The problem
- Aiming lights at reflective surfaces such as glass creates distracting glare that blocks the view outside.
- Technical explanation
- Light should be aimed at walkways and opaque walls. Avoid aiming lights at windows at night entirely, so you can enjoy the view of the garden.
- The result
- A comfortable evening sitting and a clear view of the villa's garden without distraction.
Common mistakeLighting windows and mirrors
“Lighting your mirrors and windows to make your home look luxurious? You're blinding yourself!”
- The problem
- Aiming lights directly at glass and mirrors bounces the light back as very uncomfortable glare.
- Technical explanation
- Glass doesn't reflect light softly like painted walls do, so lighting should be from the side or hidden behind the mirror (Backlit) to avoid discomfort.
- The result
- Hotel-style bathrooms and corridors, without visual discomfort.
Common mistakeRandomly placed bollard lights
“Has your garden turned into an airport runway because of your path lights?”
- The problem
- Placing bollard lights too close together, randomly and excessively
- Technical explanation
- The ideal path bollard is spaced every 4 to 5 metres, and its height should ideally be half the width of the area being lit
- The result
- Elegant, calm garden paths with no extra fixture costs
Common mistakeLighting trees the wrong way
“Garden looks gloomy at night? The secret isn’t the trees, it’s the direction of the light!”
- The problem
- Using bright floodlights that hit the trees from above
- Technical explanation
- High-end tree lighting (as in luxury Dubai projects) relies on concealed lighting from below (Up-lighting) to cast dramatic shadows on the walls
- The result
- A home garden that looks like a luxury resort
Common mistakeChoosing the wrong wattage for façades
“Want your villa façade to stand out from afar? Don't fit it with a 5 W light!”
- The problem
- Using very weak Grazer fittings for tall façades.
- Technical explanation
- A tall façade needs a 36 W fitting (about 2300 lm) to reach the top of the building, while 5 W (300 lm) is left for soft lighting of lower walkways.
- The result
- A palace façade that catches the eye of the whole neighbourhood.