How Much Light Does A Bonsai Require?
Providing the correct amount of light for your bonsai is crucial to keeping it healthy. However, there are no simple answers as to how much light bonsai trees in general "require". Light requirements are specific to the type of tree and are further dependent upon specific variations in the location they are kept - namely your home. It is a good idea to speak to your local bonsai supplier or a fellow bonsai enthusiast that has experience growing bonsai in a setting very similar to your own.
What Kind Of Light Is Best?
Sunlight is by far the best type of light for bonsai trees and most other living creatures on earth. As such, the brightest window in your home is arguably the best spot for your indoor bonsai trees. However, the brightest window in your home may be located next to the fireplace. So, in a case like this you need to find an alternative and more practical location and use some type of artificial lighting system.
What Kind Of Artificial Light Should You Provide?
A grow light and timer are a simple solution for providing additional light. Set your timer for 12 to 16 hours of supplemental lighting and position your bonsai within 1 to 4 inches of your light source.
Again, speaking to a local bonsai supplier or enthusiast is invaluable. If possible, visit their homes to actually look at their set up and ask questions.