Unfortunately there are still some bugs with UDL and scripts. Currently, TokenMod will update the settings on the token, but they won't 'take effect' and do anything until you manually open the token and click on 'Save Settings'. The command you are looking for is to replace bright_light_radius|60 with set directional_bright_light_total|60 and add directional_bright_light_center|180 to get the light to be at the 'top' of the token.