I needed replacement bulbs for string lights that I bought at a big box store. Over half the bulbs died within a few months of installing and it was a pain to climb the ladder to replace them so often. It's also very hard to find this G40 size at a decent price. I invested in some LED bulbs on Amazon hoping they'd last longer, but they're a very bright white color that doesn't work so well in the living room. These Afirst bulbs are a similar color to the original "warm white" ones that came with the string lights, as you can see in the picture from left to right: 1-LED, 2-Original 3-Afirst brand. Hopefully they'll last longer than the original bulbs!