Flare Ψ, the correction factor (black line) that can be used to convert the observed fractional flare energy L_fl/L_Kp to the metric for comparing between stars of different masses, L_fl/L_bol. This Ψ was computed using the bolometric and Kepler absolute magnitudes from a 600 Myr PARSEC isochrone (Bressan et al. 2012). Here we show this correction factor vs. g − i color as a proxy for mass or spectral type (e.g., see Covey et al. 2007; Davenport et al. 2014b). A polynomial fit to the Ψ factor is also shown (blue line) and is described in the text below.