I recently realized that my desk lamp sucks for my hobby work. The colors are to much off compared to daylight. I have heard about full spectrum lights a while ago, but then I don't see them in shops anywhere around. Instead we have RGB LED lights available everywhere. I am curious how good are they regarding perception of colors. Obviously I'm not looking for a fancy light which can make my room a disco dance stage.
RGB lights consist of three narrow-band LEDs which can approximate different colour balances by varying the dimming of each LED. As such, it's unlikely that they would have a good CRI (the spectrum consists basically of three spikes). I can imagine improving that by combining them with white LEDs (which give a slightly more full-spectrum light by using phosphor coatings, but it's still probably a bit ropey.
For your requirements, look for lights with a CRI of over 80 (and ideally over 90).
Your brain won ́t compute "light" the same way as the next persons noggin, that is why there are certain standards that you can use regardless of the light source to get at least the ball-park right.
Warm white at around 3500 kelvin
Universal white comes in between 3300 kelvin and 5300 kelvin and daylight is recognized at 5300 kelvin and above.
Or am I misunderstanding your question?
If you need 100% CRI you have to use incandescent or halogen light. There is no way around it as only those have a continous spectrum due to true black body radiation. Even so called color proof CFL or LED are not 100% accurate. Never the less the Osram Color Proof T8 are a used in the printing industries https://www.osram.com/ecat/COLOR%20p...GPS01_1027898/ .
Sunlight is the most full spectrum light followed by tungsten halogen. Everything else is poor in comparison.
Having said all that the Ikea bulbs are far better than you would expect.
I'm making models. This time around it's getting dark around 5 pm so I painted my latest creation, a medieval castle, using a LED desk lamp. The next day I discovered that the colors are subpar so I repainted a lot of the elements.
I've never thought I need a perfect lightning, but since I discovered that my current lamp is way too inadequate I thought of making a good research before buying a new one. I'm rather thinking of something price wise. If a perfect lamp is not much more expensive than something average good, than sure I'll take the best one
Using the halogen lamp I had gave too warm a white and I found out I was over-compensating so everything came out with a blue tinge.
Sunlight filtering through is too uncontrollable, and too undependable.
The Ikea ones are great for ensuring colours match.