In this work, robustness of controlled density of optical states in doubly driven artificial atoms is studied under phonon dissipation. By using both perturbative and polaron approaches, we investigate the influence of carrier-phonon interactions on the emission properties of a two-level solid-state emitter, simultaneously coupled to two intense distinguishable lasers. Phonon decoherence effects on the main features of the emission spectra are found to be modest up to neon boiling temperatures ($\ensuremath{\sim}30$ K), as compared with photon generation at the Fourier transform limit obtained in the absence of lattice vibrations (zero temperature). These results show that optical switching and photonic modulation by means of double dressing do not require ultralow temperatures for implementation, thus boosting their potential technological applications.