Battery Operated Motion Detector Light What, If Any, Are The Secret(s) To Keep Deer (& Rabbit, If Possible) Out Of A Garden? I've Heard Hair?

What, if any, are the secret(s) to keep deer (& rabbit, if possible) out of a garden? I've heard hair? - battery operated motion detector light

We live on a dirt road full of deer. I thought maybe battery powered motion sensor light? varmits and deterrent to deer. I just want to develop to the basics ... Tomatoes, mixed peppers, cauliflower and perhaps broccli. Open to suggestions.