I bought some sunny robyn oriental lilyis and planted them outside the temperature drop and the lily’s are brown are they dead .
If they were lilies that were grown on in a greenhouse for earlier flowering and they have been frozen then yes, they are probably dead. On the other hand, if the bulb in the soil didn’t freeze then there is a chance it might survive but you won’t be seeing a flower on it until next spring, over a year from now.