  We present Spitzer observations at 3.6 and 4.5 microns and a near-infrared
IRTF SpeX spectrum of the irradiated brown dwarf NLTT5306B. We determine that
the brown dwarf has a spectral type of L5 and is likely inflated, despite the
low effective temperature of the white dwarf primary star. We calculate
brightness temperatures in the Spitzer wavebands for both the model radius, and
Roche Lobe radius of the brown dwarf, and conclude that there is very little
day-night side temperature difference. We discuss various mechanisms by which
NLTT5306B may be inflated, and determine that while low mass brown dwarfs (M<35
MJup) are easily inflated by irradiation from their host star, very few higher
mass brown dwarfs are inflated. The higher mass brown dwarfs that are inflated
may be inflated by magnetic interactions or may have thicker clouds.
