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# [Python 3], 35 bytes

<!-- language-all: lang-python -->

    lambda x:[chr(ord(i)|32)for i in x]

[Try it online!][TIO-lasc33vu]

[Python 3]: https://docs.python.org/3/
[TIO-lasc33vu]: https://tio.run/##RdRpV6JgGMbx934KogUoo9JWC1tmmn3fZ9QZkSUxBQIsDemrO1yX53i/4PBjeVj@B554mvWjsD73rfZ8aI96rq1MGi2nn@hR4uqBMavXDD9KlEAJQmXSmWdemv1z7NRLFUvJK6qiKo1yUasVdYVcAdsqXa7KjVV6FVwj18B1ch3cIDdAjdRAndRBgzTATXIT3CK3wCpZBbfJbdAkTXCH3AF3yV1wj9wDa2QNrJN1cJ/cBw/IA/CQPASPyCPwmDwGT8gTsEE2wFPyFDwjz0CLtMAm2QTPyXPwguyCl6QNXpE98BnpgM9JF7wmPfAF6YMvyRvwFdkHX5MB@IYcgG/JW/AdOQTfkyPwAxmCH8kI/ETG4GfyDvxCJuBXMgW/kRn4nRyDP8h78Cf5AP4iJ@Bvcgr@IR/BFpnz@2vTM7hDFuBf8gnsSlVbqvakqiNVXanqSVVfqt5I1b5UDaTqQKreStWhVB1J1VCqRlI1lqp3UjWRqqlUzaTqWKreS9UHqTqRqlOp@ihVc6k6k6iFRH2SqHpLz69DZxilnlsYncVvq@d67i13FvyLLy@uzEVgu9szEbmoVDjNhPE4qyreJPaczHMx6ciMYwaZN0p1o1FRlGiclWeWc5CmmYMoCHVf51jDKA/GSRBmuq@pOfeVD2s1y3dYjClUDefYaeol2fI61vKe8/8 "Python 3 – Try It Online"

Performs a list comprehension on the input string; for each character it:

* transforms it into the ASCII character code integer representation using `ord()`
* performs a `binary or` with `32` (or `0b100000`) to convert it to lower-case
* transforms it back into a string representation using `chr()`

Inputs as a string, outputs as a list