Natural sunlight will always be the best light possible; however, LED lights can come very close to the natural sunlight. When LEDs started, the bluish light was very harsh on the eyes, but the technology has come a long way and there are many benefits to using LED lights today.
Most LEDs are running at about 5000 Kelvin for color temperature while the sun runs at about 6500 Kelvin. There are still the standard warm light and soft white colors available if you are not looking for too bright of a light; however, for nighttime outdoor use, as close to daylight will allow you to see the best.
LEDs also provide a much longer light as the LEDs last years, 15 years or more. On top of that, they use a fraction of the power than standard lamp options; granted incandescent lamps are being phased out at this point. The long life and lower power usage provides huge savings over the life of the lamp.
When using solar, LEDs will stay the go to option as they run directly from DC power and do not require any additional equipment to convert the energy produced by the solar panel to operate the fixture. This lowers the usage of the lamp as there is no loss in power for converters or inverters. In the end, this lower the size of the solar power system required to run the light and again saves money.
Replacing all lights with LEDs immediately may not be feasible as LEDs are more expensive for initial purchase, but as lights go out, either inside or outside, household or commercial, changing over to LEDs over time may be easier on the budget. And as the savings to your power usage adds up, you will easily be able to put the newly freed up funds into changing over more and more to LED. Then just sit back and let the light shine on.