Take the cheapest you find. For comfort, you may remove the red disc filter under the lens, then you place on th eempty support the constrast filter you want.
I've been contact printing a lot with something like this:
This ir not IR commanded, but it is a radio remote, so you glue the remote on the table (with a velcro) and you set Yellow or Purple one after the other with different times for different contrast levels, a metronome is nice to count seconds. You dodge while the low contrast (yellow) or the high contrast (purple) exposure. Later to set Purple to burn the shadows and Yellow to burn the highlights, if necessary ...or you press Red and you have safe light. A joy !!
You may place (perhaps) the rgb bulb inside the enlarger or in the bare ceiling.
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