Is a 600w hps on 750w setting ok?

I can't find a good ballast that will run 400 600w and 1,000 W bulbs anymore. I used to have a couple lumatech ballasts, they were awesome. Matter of fact, one of them still running after 3 1/2 years. Couldn't find a galaxy in stock except for Amazon which is marked up by $100.. So I got stuck with a nanolux ballast 1000 W. It's dimmable 50% and 75% but I needed to run a 600 W bulb. My other ballast is1000 W but my room cannot handle two 1000 W bulbs at the same time due to heat. So I have to run a 1000 W and a 600 W.

So my question is can I run a 600 W bulb at 750 W. I'm not gonna run it at 500, because 600 W is not bright enough anyway

you wanna overdrive a 600w hps bulb by 150w

No I wouldn't

shortens the life of bulb

excess heat etc

AVOID

If its just a 1000w dimmable ballast then don't use a smaller rated bulb on it.

The start-up voltage of a 600w bulb requires much less voltage compared to a 1kw bulb.

OK thank you