"This is a small and light table."

Translation: Ez egy kicsi és könnyű asztal.

[Sasquoch]

are "kis" and "kicsi" interchangeable?

[Hulk014]

Kis is just a form of kicsi which can be used in adjective position (but not in predicate position like ‘this house is small’, ez a ház kicsi).

[Sasquoch]

so it could be used in the sentence above?

[Hulk014]

Nope. You should use only "kicsi" in this one.

[vvsey]

So, we have to further restrict the rule for "kis" to be immediately before a noun or another adjective (maybe even an adverb) that also refers to the noun. But not even an "és" can be after it, otherwise it changes to "kicsi".

• kis piros labda
• kicsi és piros labda

Really, "kis" likes to be closely attached to its noun. It likes to be part of a compound word. As in "kislányok" - little girls.
"Kicsi" has no problem standing on its own.

[Sasquoch]

köszi :)