Small growth of leaves this may happen when using 12/12 in limited space. I run lights at 3500k in order to keep light close to the plant. This is ideal for those on a budget. I use a goal zero light a life full setting. Cheap light but will get the job done if you water and keep the light schedule consistent. Power source: usb power dock full charge six hours. Will last 20 hours on 1.0W. Lasts 13 on 2.0W (my main setting ) Power dock charge time the same