I think candles are a good gift, if you know the family lights candles on the Sabbath. However, what would be good for you to know is that there are many brands of "Sabbath candles," specific candles made for Sabbath and holiday lighting. Some are very simple and useful like these boxes of 72:

https://www.amazon.com/Yehuda-Hour-White-Sabbath-Candles/dp/B0060C89NC/ref=sr_1_7?crid=HE25EP18UUAK&keywords=Jewish+Sabbath+candles&qid=1678491311&sprefix=jewish+sabbath+candles%2Caps%2C734&sr=8-7

Others are more upscale, like these boxes of 12 handcrafted ones:

https://www.amazon.com/Crafted-Shabbat-Jewish-Sabbath-Candles/dp/B000HLK4VM/ref=sr_1_10?crid=HE25EP18UUAK&keywords=Jewish+Sabbath+candles&qid=1678491480&sprefix=jewish+sabbath+candles%2Caps%2C734&sr=8-10

Anyway, if you go to amazon.com and look for Jewish Sabbath candles, you might find something nice!