Organized firefly tours or experiences that are respectful to the environment?

Some guesthouses in suitable rural areas organize short, low-impact evening walks to see fireflies with a local guide who knows good spots. These are usually better than commercial 'tours' that might use lights or disturb the insects. The experience is weather and season dependent. Go with operators who emphasize minimal disturbance (no bright lights, small groups, staying on paths). It's a delicate natural phenomenon — the best experiences are quiet and respectful.