* Brightness: Aim for 500-700 lux. This is roughly equivalent to the brightness of an overcast day. You can buy a light meter to measure this if you're concerned, but generally, you'll know it's too dim if you're squinting, and too bright if it's causing you discomfort.
* Color Temperature: A color temperature of around 5000K (Kelvin) is generally considered ideal for studying. This is a cool white light, similar to daylight. Warmer light (lower Kelvin) can be more relaxing but may be less stimulating for focused work. Avoid overly cool, bluish light as this can also be tiring.
* Type of Light: Several options offer good light for studying:
* Natural Light: If possible, sit near a window, but avoid direct sunlight, which can be too harsh. Use curtains or blinds to control the amount of sunlight entering the room.
* Desk Lamp: A good quality desk lamp with adjustable brightness and color temperature is ideal. Look for LED lamps, which are energy-efficient and long-lasting. Choose a lamp with a flexible arm to direct the light where you need it.
* Overhead Lighting: While overhead lighting can be a supplemental source, it shouldn't be your sole light source. It often casts uneven shadows. Consider using a combination of overhead and desk lighting.
* Full-spectrum lights: These lights attempt to mimic natural sunlight, potentially improving mood and alertness, although the evidence supporting this is mixed.
* Avoiding Glare and Shadows: Position your light source to avoid direct glare on your screen or books. A lamp placed slightly behind and to the side of your work area is often optimal. Avoid harsh shadows by using multiple light sources or diffusing the light with a lampshade.
In short, the best light for studying is bright, consistent, and comfortable, mimicking natural daylight as closely as possible without causing glare or harsh shadows. Experiment with different light sources and positions to find what works best for you.