is it safe to place seedlings under 600w MH?

silentzombie

Active Member
is it safe to have new seedlings under a 600 watt MH? the lamp is 36" above the tops of the seedlings. The reflector is air cooled and my temp is ~77-80F.
 

Drr

Well-Known Member
you can use whatever lamp you want as long as its far enough away, that the light intensity and heat isn't too high at the point where the seedling is sitting.. probly better off using that correctly then a shop light.. but a shop light will do you no problem..
 

silentzombie

Active Member
ok, i set the MH lamp up to 4 feet from the tops. i couldn't fit the shop lights, my cab is only 42" x 30". When should I start lowering the lamp?
 

vegasendo

Active Member
can i see pics of your grow room?

u say 600mh do you mean 600w MH CONVERSION? i just bought one of those recently. please let me know. also what kind of seeds. did you germinate and sprout before putting in? are you growing soil ? hydro?? umm what size pots are the seedlings in? what kind of soil did you use?

what kind of fan and filter do you have?



ok, i set the MH lamp up to 4 feet from the tops. i couldn't fit the shop lights, my cab is only 42" x 30". When should I start lowering the lamp?
 

silentzombie

Active Member
I'll get some pics this afternoon. Its bag seed started in a Burpee germination tray. I just put the seeds in the wet plugs.

I plan on growing with a soil / perlite mix (i was thinking maybe 60/40) and transplanting to 4in. pots once the roots are well established and then to 3 gallon conatiners.

And yes it is a MH conversion lamp for my 600 watt digital HPS system.

The room itself is a small six foot tall box I built. For ventillation I have a twin window fan bringing in fresh air and a 500 cfm inline fan pulling hot air from the refclector.
 

vegasendo

Active Member
where did you get that bumpee tray?? i havent got anything like that and am about to start my grow maybe i shuold pickk one of those up..

anyways i look forward to the pics arriving..

meanwhile i was planning on putting the seeds in the soil to sprout and putting it under mh .. not starting seed like u did then putting under MH ..

I'll get some pics this afternoon. Its bag seed started in a Burpee germination tray. I just put the seeds in the wet plugs.

I plan on growing with a soil / perlite mix (i was thinking maybe 60/40) and transplanting to 4in. pots once the roots are well established and then to 3 gallon conatiners.

And yes it is a MH conversion lamp for my 600 watt digital HPS system.

The room itself is a small six foot tall box I built. For ventillation I have a twin window fan bringing in fresh air and a 500 cfm inline fan pulling hot air from the refclector.
 

silentzombie

Active Member
I actually did pop these with the MH on. I got the germ tray and watering mat at lowe's

Here's the pics.

The cabinet has a velcro closure I made myself with a vinyl shower curtain and two layers of 8 mil black plastic.
 

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silentzombie

Active Member
wanted to post an update with pics from day five and six, but my internet went down.

today I'll try to post pics as I transplant these into 16oz cups. The Burpee tray is much to shallow for a deep rooter like mj, I don't know if I'll try it again.
 
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