Light distance and setting on seedlings

[Ian48]

I have a 600 watt hps bulb with ballast the settings on ballast say 250 400 600 Which is for seedlings and at what distance should the bulb be from top of seedling

 

[Byorn54]

HPS Distance from Plant

Hey, i was wondering how far the distance of HPS lamps, 400 watt, should be from plants throughout the grow process. I am just starting now, what should my seedling distance be, vegetative and flowering distance. i am going to use the hps light the entire time.

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[spek9]

My brand new seedlings go immediately under a 400W MH that's about 18-20" above the plants.

 

[manfredo]

600 watts is a bit much for a seedling, and a waste of electricity unless you are starting a lot of seedlings. You could pick up a 250 watt HPS bulb, or I use LED for starting and vegging then switch to HPS for flower. I like the LED's for vegging, and mine are just some relatively cheap China ones. The ballast should be set to match the bulb with HPS though...It's not good to dim them, although people do.

 

[MissMadMunchies]

600 watts is a bit much for a seedling, and a waste of electricity unless you are starting a lot of seedlings. You could pick up a 250 watt HPS bulb, or I use LED for starting and vegging then switch to HPS for flower. I like the LED's for vegging, and mine are just some relatively cheap China ones. The ballast should be set to match the bulb with HPS though...It's not good to dim them, although people do.

All I have is a 400w hps bulb and seedlings I am trying to get going (all germinated and now in soil) but if this is all I have is there maybe a partivular distance to keep them all at until I see growth? I already overheated one of my seedlings *my set up is in a closet fixed it with fans temporarily until I can get an adequate intake and what not going? sorry if this is vague.1

 

[go go kid]

stick your hand under the light at the height the seedlings will be, you should feel warmth but not heat. heat will burn them