Yeah I have a power source, there is just no place to connect the wire on the streetlight to get it to work.Probably could be done unless you also wanted to provide a power source.
<property name="Class" value="PoweredLight"/>
<property name="RequiredPower" value="1"/>
<property name="RuntimeSwitch" value="true"/>
<property name="Light" value="1"/>
<set xpath="/blocks/block[@name='streetLight01']/property[@name='Class']/@value">PoweredLight</set>
<append xpath="/blocks/block[@name='streetLight01']">
<property name="RequiredPower" value="5"/>
<property name="Light" value="0.5"/>
</append>