Type of bulb depends on which version of the Shay you have. Could be either an incandescent or LED. The headlight is held to its base by two tabs that "snap" into the headlight base. Depress the tabs just slightly and the headlight will be free of the base. From that point you can proceed with changing the bulb.
"One of the Enthusiastic Children"
JD
"One of the Enthusiastic Children"
JD