Any way to change light bulb colors?

I am doing a music video that will have light bulbs in the background of the subject and the subject lit up front. The artist is wanting the bulbs purple. Is there anyways I can change the coloring of the bulbs in FC to purple or should I just go ahead and buy a bunch of purple bulbs?

Buy purple bulbs.
If you already know, shoot the way it´s going to be.

It´s probably possible in post, but could be a lot, really a lot of sophisticated work to get it the way you want.

Doing that specific trick in post will be a horrible nightmare, don't even think about it. Just by the purple light bulbs, be done with it.

timothy.hudson wrote: … light bulbs in the background … and the subject lit up front. …

wot?
how do you lit from the back something in front??

You can do a lot of magic in post, changing an overall lighting from white to purple is easy.. but when it comes to detail, e.g. the face has just some purple sidelight/hairlight, things get crazy. or, if you want to create a sort-of volumetric light..

I'm with the others: colored bulbs, Lee filters... kinda....

Purple bulbs?

Just buy purple bulbs? Sounds all too easy!

There's purple, and there's purple...

And then there's ultraviolet bulbs, or dimmable bulbs, or bulbs of different wattage.

Which all have different lighting characteristics, many of them weak in that respect.

Better work out with the artist which are closest to his/her notions?

Then there's fine-tuning of the purpleness, which you could do in FCPX using masks and changes to color/saturation.

Post the results so we can see how it turns out!

Purple bulbs behind the subject in the background, with another light in front of the subject lighting him, those background lights are going to be very difficult, next to impossible without serious, long, hard work, to change colors in post. If you were changing the coloring of all the lights in a shot, easy. But mixing light colors, well, that's not easy, far from it.

Do you have and know how to use a light meter? Light bulbs are point sources. The filaments are stupid bright. You need to be be able to either cope with or compensate for the exposure ratio between the lightbulbs and the lighting on the scene.
The transparent glass envelopes are not bright unless they're frosted or obscured, in which case everything discussed here will be different.
Purple light bulbs are not necessarily an off-the-shelf item, but readily available in online catalogs, so you may be dipping standard bulbs in a transparent paint. Paint might burn because filaments are so hot. Assuming they are ancient incandescent bulbs, if you use a dimmer to reduce the brightness and temperature of the purple bulbs you're going to change the color temperature.
A purple bulb may not actually appear as purple to your camera.
If they're CFLs or LEDS, you might introduce flickering at the mains Hz and possible mismatches with your shutter speed that can result in a pulsing exposure that you will not se until you play back your shots.

You can get strings of purple xmas LEDs but they're are still going to be very bright objects compared to the rest of the scene.

How many of these purple bulbs must you have on the set and in the shots?
Can you put easily obtained, dimple, low wattage, frosted light bulbs in instruments or fixtures that will allow you to use purple gels?

What others are saying... if the light bulbs are more of a stage/decorative element, use purple bulbs. Colored bulbs are also not as bright as normal bulbs—which you can use to your advantage. They shouldn't over expose as easily.

One thought here: The Force Awakens actually used lights on the lightsabers—not to resolve the need to roto a blade, but to cast light onto the actors. In your case, the purple bulbs will cast purple onto the backs of the talent and onto the set/floor/walls. Knowing a little color theory, you can now get warm lights to compliment the purple. Then you can enhance these colors in post.

Purple's compliment: yellow.
You can also push this a little more towards orange.
A split complimentary color scheme is purple, orange and teal/blue.

Gentlemen!

No doubt, the combined expertise in this thread is awesome, but we shouldn't overwhelm a first time poster by making things probably more complicated as they are.

He probably will perform some tests before. And the good news: modern technology gives an instant feedback, no need to wait days 'til you get your parcel from Kodak....

Test your purple bulbs, check results, compare to imagined, try a few diff. set-ups, come back if it doesn't work out.....

less think more do ...

or you could try using mFlare from motionVFX, (as there is a free demo version if I remember correctly) and see what you can change in post-production

True, Karsten, but being offered (more often lectured) more information by those who possess more knowledge than I was how I learned how to shoot 16mm film with a variable shutter, set studio lighting for precise exposure, and edit 2" quad videotape.
The waveform and vectorscope are essential tools for weird lighting situations and color correction yet most FCPX users don't know what they are or how to read them. The handheld lightmeter has become a quaint antique but I still use my Minolta spot regularly in the studio. I also use the waveform on my Panasonic camera.
The OP may take the easy path.
Using the correct tools during setup and production is far easier, and cheaper, than throwing software at inadequately or improperly shot video.