import requests

token = "put your token here"

headers = {
    "Authorization": "Bearer %s" % token,
}

payload = {
    "power": "on",
    "color":  "kelvin:2750",
    "brightness": "0.50"
    
}

response = requests.put('https://api.lifx.com/v1/lights/all/state', data=payload, headers=headers)