BJCP 16D
A fairly strong, malt-accentuated, lagered artisanal farmhouse beer.
Three main variations are included in the style: the brown (brune), the blond (blonde), and the amber (ambrée). The darker versions will have more malt character, while the paler versions can have more hops (but still are malt-focused beers). A related style is Bière de Mars, which is brewed in March (Mars) for present use and will not age as well. Attenuation rates are in the 80-85% range. Some fuller-bodied examples exist, but these are somewhat rare.
Jenlain (amber), Jenlain Bière de Printemps (blond), St. Amand (brown), Ch'Ti Brun (brown), Ch'Ti Blond (blond), La Choulette (all 3 versions), La Choulette Bière des Sans Culottes (blond), Saint Sylvestre 3 Monts (blond), Biere Nouvelle (brown), Castelain (blond), Jade (amber), Brasseurs Bière de Garde (amber), Southampton Bière de Garde (amber), Lost Abbey Avante Garde (blond)
You can view the complete style details on the BJCP website. The 2008 style guide is obsolete but there is a similar 2015 style that you can view below...
OG: 1.060-1.080
FG: 1.008-1.016
IBU: 18-28
SRM: 6.0-19.0
ABV: 6.0-8.5%