Wedding Centerpiece for Rustic Wedding with No Candles

I love the idea of using fairly lights - this looks very cool!

I like the idea of some fake tea lights in votives to scatter along the garland - if you get gold mercury or another color votive, people probably won't notice (nor should they care) that the candles inside are fake!

I will echo - fairy lights! Love em. If you wanted to add other things you could do small vases with an LED candle at the bottom and blue and navy roses on top (fake or real!) for some added heigh differentiation. You could do pillar candles unlit, as suggested above, or depending on the full aesthetic of your day (you said its in a barn, but I never assume) you could do mason jars (or even wine glasses!) filled with battery operated tiny tiny fairy lights inside.

These could also be massively customized. You could have flowers coming out of them or change the light colors. Or do a paint spray to make them slightly opaque ... lots of options.

You could also do letters, such as your initials in there as well. An unfinished wood, or that cardboard type substance ones they sell at craft stores. Or you could make your own and paint them. You could have rose petals sprinkled in as well... Lots of options that you can keep the costs down of! Take look at places like the Dollar Tree and Oriental Trading Company. I just bought 96 candle holders for my centerpieces from the Dollar Tree. Its giving me 6 (!) extra candles per table (with some to spare!) and cost me under $100 (with free shipping when shipped to the store). Things can look really elegant and gorgeous and be secretly cheap as heck ( my favorite kind of way to be! ).

I agree that it looks nice the way it is, but mixing in some fairy lights would be super cute! We are also having garlands and not putting any candles or anything else on the tables because we wanted quite a pared back, masculine look (the rest of the flowers are VERY floofy and girly) and I like the idea that my guests won't have to lean to one side of a big arrangement or a candelabra to be able to see each other across the table and chat!