Bugs and Suggestions

Hi all,
i'm doing my first steps in react.
this code should write "On" but i get "App.js: Unexpected token, expected ( "
what am i missing?
<pre lang="javascript">

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';

class Light extends React.Component {
	
	constructor(props) {
		super(props);
		this.state = {light:"On"};
	};
		
	function formatLightState() {
		return <h1>{this.state.light}</h1> ;
	}

	render() {
		return (
		<div>
			{this.formatLightState()}
		</div>
		);
	}
}

class App extends React.Component {
  constructor(props) {
	super(props);
  }

  renderLight(){
	  return <Light />
  }

  render() {
    return (
		<div>
			{this.renderLight()}
		</div>
	);
  }
  
}

export default App;