Spare pins on DIY Basic kit

I want to use a simple Green, Yellow, Red LED on a DIY Basic kit (PCB Version 4.0). The PCB has solder holes for pins D0, D7 and D8. I know I could use an LED strip, but I have an existing RYG “traffic light” style already. Any reason I should not use these 3 pins?
I have an ammeter on the USB plug and notice mA consumption is typically 120 mA and very occasionally spikes to 340. I believe a typical LED draws 20 mA and Wemos D1 mini is rated 500 mA.
Seems like this is a helpful and easy hack. LEDs show status at a glance from a distance. Ideas/feedback?
traffic light LED example:
https://www.aliexpress.us/item/3256805682469648.html?src=google&src=google&albch=shopping&acnt=708-803-3821&slnk=&plac=&mtctp=&albbt=Google_7_shopping&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=20123152476&albag=&trgt=&crea=en3256805682469648&netw=x&device=c&albpg=&albpd=en3256805682469648&gclid=Cj0KCQiAuqKqBhDxARIsAFZELmKAPz035lKFNHyhFcDyEhq-ZfZu785UZeNjuwF9XEf07L1XexV-QC0aAocdEALw_wcB&gclsrc=aw.ds&aff_fcid=84a907cccc5f4166b6e54d35594c9bd4-1699294542322-05030-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=84a907cccc5f4166b6e54d35594c9bd4-1699294542322-05030-UneMJZVf&terminal_id=5dc5549d854a4d7f83dc1d4fb6290f41&afSmartRedirect=y&gatewayAdapt=glo2usa

I guess it should work.