Hi Dennis,
Either would do. White lithium grease is preferred wherever water or moisture might be present as it has a higher resistance to that. So, if the parts are directly subject to dew, it would be good.
However if all is internal and sealed then the LM grease is fine. If you do want to get the white grease, it is even available in a spray form, brand CRC or WD40, from auto parts stores.
Cheers
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