Light lumens

[Nath]

Just wanted to know if there was a guide somewhere to the lumen output of the different HID lighting lamps. In particular I was after the 1kW Metal Halide specs, since I think the 600w HPS' are like 90,000 lumens.

 

While Im here I might as well ask this: I can get 2x 1kW Metal Halide kits for cheap and wanted to know if they would be much better than 2x 600w HPS'... Im thinking they would be but in an apartment it would probably be cooler running the blue spectrum, would it not? Also, I dont want to have too high of a power consumption from the apartment, but I think 2kW is ok 12hours a day. Im planning on growing about 10 clones or so plus some seeds in a small bedroom area of about 3m x 3m+.. using the door with holes cut in it for in/output of air and a carbon filter inside the room sucking the odour out of the exhaust air.

 

Thx

Nath

[Guest Eikel]

http://www.overgrow.com/growfaq/945

 

Tables of all common globes and lumen/PAR/etc ratings, should give you the info you need I think.

 

I don't think "blue light" is any cooler than "red light" though?

[Nath]

Thanks thats a great guide... its right when they say lumens for humans, par for plants isnt it? Or have I got it mixed up... Im thinking the 1kW lights are the go here then.

 

Cheers

Nath

[nitram]

Nath ...Just wanted to know if there was a guide somewhere to the lumen output of the different HID lighting lamps. In particular I was after the 1kW Metal Halide specs, since I think the 600w HPS' are like 90,000 lumens.

 

Just been doin some looking at this:

 

Dose any here help ?

 

Here is a low down of how many lumens each light unit gives off. These are based on the Philips Son-T (h+ and HPI Halide light (HID).

 

Lamp: 400W Halide

Lumens: 38,000

Efficiency: 95 lumens per watt

 

Lamp: 400W Sodium

Lumens: 53,000

Efficiency: 135 lumens per watt

 

Lamp: 600W Sodium

Lumens: 92,000

Efficiency: 153 lumens per watt

 

Lamp: 1,000W Halide

Lumens: 115,000

Efficiency: 115 lumens per watt

 

Lamp: 1,000W Sodium

Lumens: 140,000

Efficiency: 140 lumens per watt

 

While Im here I might as well ask this: I can get 2x 1kW Metal Halide kits for cheap and wanted to know if they would be much better than 2x 600w HPS'... Im thinking they would be but in an apartment it would probably be cooler running the blue spectrum, would it not?

 

I don't know if this would help work out your heat: I think you have to switch/jump to talkingr in 'Kelvin' (colour temps). I did not see a HID rating on it to compare with a HPS

 

The higher the colour temperature, the more 'blue' the light, and the lower the colour temperature the more 'red' the light. Colour temperature of light can be measured in degrees Kelvin (K). Daylight has a colour temperature between 6000 and 7000 K. The colour temperature of artificial light is much lower: approximately 3000 K. In reality, colour temperatures range from 1900 K (candlelight) up to 25,000 K (clear blue sky). Television is set to 6500 K, simulating 'standard daylight'.

 

Colour temperature Source in Kelvin

12,000 - 20,000 Skylight (blue sky)

8000 Average summer shade

7100 Light summer shade

6500 Typical summer light (sun + sky)

6300 Daylight fluorescent (caution!)

6400 Xenon short-arc

6000 Overcast sky

5900 Clear mercury lamp

5400 Sunlight (noon, summer, mid-latitudes)

5200 Design white fluorescent

5000 Special fluorescents used for colour evaluation

4800 - 5000 Daylight photoflood

4300 Sunlight (early morning and late afternoon)

4000 Brite White Deluxe Mercury lamp

3500 Sunlight (1 hour after dawn)

3400 Cool white fluorescent (caution!)

3400 Photoflood

3200 Professional tungsten photographic lights

3000 100-watt tungsten halogen

2950 Deluxe Warm White fluorescent

2870 100-watt incandescent

2500 40-watt incandescent

2100 High-pressure sodium light

2000 Sunlight (sunrise or sunset)

1850 - 1900 Candle flame

1700 Match flame

 

To get the best performance when using both light together when light is concerned follow this table below.

 

1 Lamp : Metal Halide for Vegging, HPS for flowering

2 Lamp : 1 Metal Halide & 1 HPS

3 Lamp : 1 Metal Halide & 2 HPS

 

Then follow this rule...

1 Metal Halide for every 3 HPS

 

:smoke

[F420]

great info, but Nath Lumens dont mean jack shit to a plant, its Par watts you need to look at.

 

Thanks thats a great guide... its right when they say lumens for humans, par for plants isnt it? Or have I got it mixed up...

 

:thumbsup

[Nath]

Yea the 1kW MH's have the most PAR watts, but for some reason the plants tend to grow faster and bud heavier under HPS lighting. In this case im determining whether using an extra 800w having 2x 1kW's will be better than 2x 600w HPS'. Dont know if I want to run 2kW+ in an apartment where there will be a caretaker in the premises.

[SukonmiSkunk]

Nath,

I use 2 600 watt hps, with SUNMASTER globes, they are excellent and rated one of the best grow bulbs. Changing your 1000 mh's to 600s will defintely help keep the heat down that extra notch, and almost half the running cost.

 

par watts you need about 30+ per square foot, so everything is reletive to the size of growspace. My 600's do a space 4x8 foot(38watts per), 1000's can do 5x5 foot, even upto 6x6 with good results. Ive seen a room 7x7foot with one 1000watter pull close to 4 pounds.....so you can stretch them even that far.

 

Depending on the size of your room, should determine what lights to use, my preference would be the 600's...HPS will give better bud structure than MH....MH will still produce....but the yield will suffer...not much but some. Quality for smoke....again my preference is the HPS But I have flowered with a MH and had nice pot too.

 

In an apartment I would be going for the 600's,

its your choice, check out my gallery.......

Good luck

SukonmiSkunk

Edited January 21, 2006 by SukonmiSkunk

[Nath]

Fair enough, I am leaning towards the 600's because of the power usage. 1200w's is a bit of power in an apartment. The 1kW's were only good caus of the cheap initial price. My next grow will be in a house with 1kW Sunmaster HPS's Also, nitram, thanks for the guide. Sorry I forgot to thank you last post.

[Gazza2001au]

Nath, 2x 1000 watters in a 3x3 room will be way to hot! you will find a single 1000 watter will even be hotter than u want these days not many people buy the 1000w lights the big sales are in the 600's these IMO are the best lights to use alot less heat than the 1000 and bigger buds than the 400 and the big lamps are only cheap now ($240 on ebay) because no one wants them Edited January 21, 2006 by Gazza2001au

[Nath]

I meant 3 metre... standard rooms for these apartments are like 10ft x 10ft... that should be ok for two 1kW's shouldnt it? Im thinking the 600's might be a little light thats all. But yea. I already own one 600w HPS, and another might be the best way to go. Either that or a rail and keep it to 600w's this grow.

 

I gotta remember we are in the middle of summer here in Perth, and temps can get high esp in tiny apartments. But I will have the right cooling for it, and at the moment its just going to be a couple of oscillating fans in the room with one facing out the door for venting. When I start flowering I have enough to get myself a proper carbon filter and centrifugal blower.

 

I was thinking of doing 10 plants also, as this is all the clones I can get for now. Maybe I could do some seeds with 12/12 straight away if there is space... but im sure 10 clones with 4 weeks veg and 8 weeks flower would fill that area pretty well.

Edited January 21, 2006 by Nath