Lighting and Colour to Make a Container Unit Look Twice as Spacious

Small-space psychology: using lighting and colour to make a “container unit” look twice as spacious

Designing a container house or a prefabricated office unit usually comes with one key limitation: a fairly narrow “interior space”, especially in a 20 ft unit, which is only about 2.4 metres wide.

But interior design and environmental psychology offer techniques that can clearly “trick the eye” into seeing a space as more open, without extending the structure or knocking down walls. This is ideal for people with a limited budget who want their home to feel comfortable and more spacious.

This article explains 3 main techniques designers use in High Cube container units to enhance “space perception”, the way occupants perceive the space.

1. Use LED strip lighting to create “layers of light” that make the room look taller

One key technique is to use hidden LED strip lighting (indirect lighting) to create dimensions of light instead of relying on a single ceiling light. The psychological principle:

When light reflects off the walls and ceiling, our brain perceives the space as deeper and taller than it really is.

How to use it in a container unit

1. Result
   The ceiling looks higher
   The room does not feel cramped
   Result
   The walls look deeper
   The room has layers
   Result
   The room feels longer
   Tip
   Use Warm White lighting, 3000K – 4000K
   It feels
   1. Cove lighting around the ceiling
   • Fit LED strips around the edge of the ceiling
   • Hide them in the ceiling cornice
   1. Backlit Wall
   • Fit lights behind a decorative wall panel
   • Use with laminate or wood panels
   1. Floor Wash Lighting
   • Hide lights along the edge of the floor
   • Comfortable
   • Not harsh like white factory lighting

2. Choose “light-reflecting colour tones” so the room seems to breathe out

Colour affects how a space feels more than you might think, especially in a small space like a container unit. Colours that help a room look more spacious:

Recommended colour group

• White
• Off-White
• Cream
• Light Beige
• Soft Grey

These colours have a high Light Reflectance Value (LRV), so they reflect light well.

The result

The room is brighter
The walls seem to recede
The space feels more open

Techniques to add to the space illusion

1. One wall colour throughout the room

Avoid using several colours, because they make the room feel “divided”.

1. Slightly reflective surfaces, such as

• Gloss vinyl flooring
• Semi-gloss laminate
• Eggshell wall paint

Light from the LEDs will reflect and help add depth to the room.

3. Use mirrors to “expand the space with reflections”

Mirrors are a tool designers use very often to make small spaces look bigger, especially in High Cube units with a ceiling height of about 2.7 metres. The principle: a mirror reflects the light and the view of the room, so the room looks larger.