RAW if it doesn't say "the area for X ft around the creature is brightly/dimly lit", then it does not produce light in the mechanical sense, even though this does create a weird mental image if you string this together as "the wildfire spirit is surrounded by flames that do not give off illumination".
The description says to make it how you like but usually with flames surrounding it, does the wildfire spirit give off light?
RAW if it doesn't say "the area for X ft around the creature is brightly/dimly lit", then it does not produce light in the mechanical sense, even though this does create a weird mental image if you string this together as "the wildfire spirit is surrounded by flames that do not give off illumination".
Thanks