exhibits higher $J$-band and *Spitzer* mid-IR amplitudes than .

was the lowest amplitude variable presented in @Vos2019. We detected variability during one epoch only, with an amplitude of $\sim0.7\%$. Our ground-based $J$-band monitoring did not cover a full rotation period and our periodogram analysis favoured periods of $2-4$ hr [@Vos2019]. We do not detect mid-IR variability in this object, and place upper limits on the variability amplitude in each channel. Comparing the near-IR and mid-IR amplitudes of all three L dwarfs observed in this paper reveals that shows the highest mid-IR and near-IR amplitudes, followed by , and shows the lowest amplitudes. All three targets show smaller amplitudes in the mid-IR than the $J$-band , which is consistent with such amplitude measurements in young and field brown dwarfs [@Biller2018; @Metchev2015a]. Atmospheric models predicts that the $J$-band probes deeper pressure levels than mid-IR wavelengths, which would explain the lower mid-IR amplitudes [@Buenzli2012].

Mid-IR Variability Amplitudes of Young L Dwarfs {#sec:amplitudes}
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Observed variability amplitudes are thought to vary with spectral type [@Metchev2015a; @Radigan2014], inclination angle [@Vos2017] and surface gravity [@Metchev2015a; @Vos2019]. In Table \[tab:variables\] we show the full sample of brown dwarfs with measured variability amplitudes and/or upper limits on infrared 