600 Watt HPS and UV Burn

Quick question: will a 600 watt hps bulb burn at 2 feet above the plant.




I have small yellow dots on leaves closest to the light and not on any leaves that are shaded.

great question..i just ordered a 600watt and am curious..can you fit a glass plate under your light?

if you get a cooltube or air-cooled hood then that normally uses 4mm toughed glass and reduces output by 5-10% but helps cooling and stops hot glass being showered on your plants if the bulb breaks.
at 2ft i would of thorght that should be fine a 1000w hps is recomendedto be hung 2ft away, unless your plants are seedlings...? or maybe a nute issue if not that?

Hey, I bought 2 600 watt hps lights from htgsupply about a month ago, and placed my 5 foot female about 9 inches below the light. Two weeks ago she started showing UV burn spots. I have since raised the light to about 20 inches or so. I can’t go any higher now; the light is as close to the ceiling as it will go.


Also, there’s no safe way to attach a UV absorbing glass plate because I bought the light with the cheapest fixture to save an extra 80 buck or so per light. I never consider the UV radius which seems to be about 12 - 14 inches for 600 watts.


I may be okay on my current grow, because I’m not going to allow them to grow to 3 feet before flowering.