Simulating daylight with artificial lighting is not a trivial task. You’re faking a light that’s 93 million miles away. That means it’s an extremely tiny light source with light rays that flow almost parallel to each other, which has a huge effect on the shadows. But that’s not the only factor in daylight. There’s also that blue sky.
So, how can we set about reproducing it realistically? Well, Matt over at DIY Perks has a solution which, naturally, is a DIY one. And it does it by recycling an old satellite TV dish and combining it with a high powered LED (he recommends this one if you want to try it for yourself). It’s an absolutely fascinating approach that looks a lot more at the actual science of daylight than most photographers and filmmakers do.