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View Full Version : mh vs hps



youngcity
09-10-2006, 11:39 PM
ok I have a 400 watt mh light that i will be using for veg growth, but i was thinking about buying a 150 watt hps for flowering. My question is would i get better flowering from the 400 watt mh because it has more output or would it be better to use the 150 watt hps because it has a better spectrum for flowering?

thanks in advance

OmegaVermelho
09-10-2006, 11:48 PM
why dont u use both?????????

harris7
09-10-2006, 11:48 PM
it's hard to say man. but you really dont want blue spectrum on your flowering plants and you also dont want such low wattage too.

I would say go for a bigger HPS (it's not much more to upgrade) because thats when power really counts

mscaboo
09-10-2006, 11:50 PM
just buy a mh bulb with added red spectrum

youngcity
09-10-2006, 11:56 PM
how big of a hps dou think would be good, and about thow much would it run me?

Cyclonite
09-11-2006, 12:15 AM
Both would be good, you will get more per watt with a HPS but its allot less watts. get a 400W HPS....you could probably find some for around $100 if you look hard enough.

UMrocksmysocks
09-11-2006, 12:29 AM
how big of a hps dou think would be good, and about thow much would it run me?

how many plants??? and or how big of a grow room??

Cyclonite
09-11-2006, 12:44 AM
If your growing 6 or less go with 400W

youngcity
09-11-2006, 01:03 AM
i'm planning on 2-4 would 250 be good for so few plants or do u still recommend 400 watts

harris7
09-11-2006, 01:35 AM
my advice. If you are deciding between two lights say 250w and 400w go with the bigger (As long as you can afford) b/c more light more buds and if you ever decide to grow more you'll have the capacity.

UMrocksmysocks
09-11-2006, 01:56 AM
my advice. If you are deciding between two lights say 250w and 400w go with the bigger (As long as you can afford) b/c more light more buds and if you ever decide to grow more you'll have the capacity.

thats a good point. you also want to take into consideration, 'how many females are you going to be left with?' unless you are going with feminized seeds, i wouldnt expect all 4 to go the distance. either or will be fine if you have the money, but if you only end up with 2 or even 1 female, 400w would be alot of energy to spend on just 1 plant. its all about the benjamins:D

Specialist
09-11-2006, 02:42 AM
just buy a mh bulb with added red spectrum

go with a red burning mh bulb, they're 3000k and are about 70 bucks.

ronjohn420
09-11-2006, 02:53 AM
id say get a 400 hps... and use your mh for clones/veg. and make a harvest every 60 days..... dont worry on the 400 hps compared to mh (the watt to lumen ratio is different) because hps still has the advantage with lumen and spectrum output..

have a good one =)