One thing to note is that LEDs, even the newish “white” LEDs, have kind of a spiky color spectrum and are subject to metameric failure (I’m sure the all of the “Hey, ‘D’ is for ‘Diode’, idiot” commenters know what that means, but for the rest of us it means colors might not look the same in your image as they did in the real world).

Works great for monochromatic post processing and will give good artistic effects as well, but don’t expect faithful color all the time.

peachey

LED can be had in virtually any color you can think of. The main reason LED lighting is so energy efficient is because only a very small portion of the wavelength is emitted contrary to tungsten bulbs where approximately the entire wavelength is being emitted. You’ll also note that tungsten bulbs give off allot of heat where LED generally gives off only a small amount if any noticeable amount at all.

Most LED’s are a single color or a small amount of the spectrum. White colored LED segments are similar to your TV where the three “primary colors” make it up. The heat is also only from those three LED’s in one segment.

*(If you increase the voltage/amps, please be careful. They can burn skin. Should you increase it more, the life either shortens allot, burn out on the spot, or explodes. That could make a tiny plastic or glass projectile go flying around the room. Don’t ask how I know this! LoL)

Here’s something you can try. When you want mood lighting, try finding color LED’s. This really works great for all kinds of shots. (Halloween time maybe?)

When you setup for a shot-in-the-dark using bulb, try flashing, pointing, etc. one or several colored LED’s around the subject. You will be surprised to find the wide variety of outcomes. If you want a stronger color just expose the color for a longer time.

For what it matters, this is something I’ve been playing around with for some 40-50 years. It just gets expensive when using film. LoL

Back before the LED days I used colored tungsten lighting, (Christmas light bulbs. Sort-of-like pocket studio lighting!)

Here’s another tip! While using camera bulb setting, you can cover the lens with your hand, or a piece of cardboard, etc., point the camera in another direction, then remove the cover from the lens for another exposure. This can be repeated a bunch of times or not whenever you think you’ve got the image you what. Pentax added multi exposure ability, (9 shots max), on their K10D and K20D, then Olympus, (4 shots max).