300w Mars hydro LED. How close to my plant?

[VACAVILLE,CA.GROWER]

I have a autoflower that will be 3 weeks old.
I have a 2x2x5 tent.
I am using a Mars Hydro 300w led, 140 actual watts.
How close should the light be from my plant?

 

[Custom420]

Mine are about 8 inches but test ur plant your plants well tell you how far from heat stress and taco leaves try it out and keep en eye out for stress if so move it up a lil bit till u hit the sweet spot good luck

 

[VACAVILLE,CA.GROWER]

Mine are about 8 inches but test ur plant your plants well tell you how far from heat stress and taco leaves try it out and keep en eye out for stress if so move it up a lil bit till u hit the sweet spot good luck

Thank you for the reply.

 

[Doo-flop]

I got one about 5" above mine, but I'm well into flower, I think I was about 12" in veg.

 

[Useless89]

Im pretty sure that light gets its full effect at around 12- 18 inches