I do remember him hot flipping now that you mention it, but that doesn't work with most digital ballast brands from what I understand anyway (i've never personally tried). Toohighmf runs quantums and obviously they are capable of doing the hot start. Hydrofarm told me via email that there must be an off period between flips for their phantom ballast, i've also been told by a fellow grower galaxy brand ballasts need the off period also. Take this into consideration when purchasing equipment or designing your flip box.