Although good lighting can improve vision and overall quality of life in the lives of adults with dementia, it's often overlooked. For example, we may think the person has lost the ability to read, but sometimes it's poor lighting – not dementia – that makes it difficult to participate in reading or other activities.

Good lighting can reduce falls and make it safer to get around. For example, good lighting – especially at nighttime – can help a person see any clutter that may have accumulated on the floor that may lead to a serious fall.

Good lighting can also reduce hallucinations for those who misinterpret what they see in a poorly lit room. For example, in low lighting, a large leafy plant may be misinterpreted as a lurking stranger within the shadows.

Studies have also shown that bright morning light can improve sleep. Exposure to bright light produces melatonin, the hormone that tells our bodies it's time to sleep.