@hook.command("lettherebelight")
def onCommand(sender, args):
    name = sender.getName()
    if name == "CONSOLE":
        msg(sender,"I'm not quite sure where you are looking at, so i'm afraid that won't work")
    else:
        # get block the player is looking at
        blocks = sender.getLastTwoTargetBlocks(None,20) # 20 is the maximum range
        block = blocks[-1] if blocks else None
        if block is not None:
            block.getWorld().strikeLightningEffect(block.getLocation())
            block.setType(bukkit.Material.GLOWSTONE)
    return True