how about natural light bulbs

Your better off with florescent lighting. They are bright, meaning that you can see what your doing if you cook at night. I'm pretty sure you don't want to fail when your cooking something! if you have regular lights or you want to keep it cheap, you could get a regular light fixture(s) and buy some CFL light bulbs for them. They are bright, they keep your electric bill low and some CFLs don't flicker when you turn them on. General Electric brand CFLs come in 8 packs and they don't flicker at all. CFL lights are like Florescent lights only smaller. And they have the colors on your food as true as anything too.

Don't use fluorescent lighting. It tends to wash things out, however it is the most economical. I just had my kitchen redone and replaced the lighting with regular incandescent bulbs and a dimmer switch. There are 3 100 watt bulbs and I can adjust the lighting to my needs. I really don't rely on the light to tell me when things are 'done' but rather a lot of experience with cooking.
I will tell you that my old lighting was crappy and consisted of an adjustable thing with 3 separate light fixtures you could focus on whatever you want. The bad thing is that the light was too high and the beam not bright enough to really focus on anything. What I have now is an overall bright light that illuminates everything.

Any bright light aimed the right way should work. Perhaps your problem is not the type of light but the amount of it you have in your cooking area but if true colour is what you want, then let's get technical here and say that you want to look for whatever lighting will give you good colour rendering. You may have to do a little research on the bulbs you use, and the info you want is not likely to be on the packaging of any bulbs you buy. You may have to check manufacturers' websites to find that out. You can search "colour rendering" and come up with various articles on it. Also keep colour temperature(Kelvin rating, expressed as 2700k, for example, in a CFL equivalent of an average incandescent bulb) in mind. A very blue or "cool" light will wash out some blue in anything you look at under it, and that might account for the different colour in your steak once you bring it out into a more red or "warmer" light such as daylight where any red there is would be less visible. In the warmer light, you can't see the red you could see in a bluer light. If you aim a strong red light at something red, the red will seem to disappear. Most light bulbs come in a variety of choices these days. Most of the big lighting makers(GE, Sylvania, Philips) have information on what kind of light their bulbs produce, what's best for certain situations, and they often have more info on the bulbs in the website than appears on the packages. You can also look at "how to choose a light bulb" articles. Artists are much concerned with light quality, so any articles about how to choose lighting for an art studio are valuable. And sometimes experimenting is the only way to tell for sure what works for you.