Alexa Echo Doesn't see Philips Hue Lights

[HAGSMICH]

For no reason at all, Alexa can't find my philips Hue led lights.  They were working fine and then one day I asked Alexa to turn of the lights and she couldn't find them. The app sees them just fine and can control them but the echo cannot find the lights.  I've tried everything including reinstalling app, resetting device, resetting the router etc! any ideas.

[HAGSMICH]

Tech support figured it out.  Alexa wouldn't respond to the the LIGHT command, it will only respond to how it is labeled exactly in the app.  Lamp instead of light.  She had no explanation why LIGHT worked before but won't now.