Which beer style is characterized by an IBU range of 15-30?

London Brown Ale fits the specified IBU range of 15-30, which is characteristic of the style. This type of ale is known for its rich malt profile, typically featuring caramel and chocolate notes, with hop bitterness playing a more subdued role. The IBU level suggests a moderate balance where malt flavor is prominent while still allowing for some hop characteristics to shine through, yet not overpower the beer's overall profile.

By contrast, styles like Pre-Prohibition Lager often emphasize a crisper, cleaner finish, potentially aligning with different IBU standards. Belgian Dark Strong Ales usually present more complex flavors and aromas, with some variation in bitterness that can exceed the mentioned range. Sahti, a traditional Finnish beer, is primarily focused on malt sweetness and herbal notes from the use of juniper, which typically results in low bitterness. Therefore, London Brown Ale uniquely aligns with the 15-30 IBU measurement due to its balanced malt-to-hop profile.