MadagascarX Posted February 6, 2003 Share Posted February 6, 2003 Its a proven fact.... The more Light your plants will recieve, the bigger, stronger they will become. The only draw back to these higher wattage unit is Heat build up! Most plants will grom most effective between temps ranging between 20-28 deg Celceus and it is also best to try and avoid large temperature fluctuations between night and day as this can lead to weak and poorley formed plants. It is ideal for most species to try and bring these two temps as close together as possible which is easier to accomplish than you think Most effective way is a propane heater (usually sold as Greenhouse heaters) Anyway......Back to the topic at hand. Here is a lowdown of how many lumens each light unit gives off, along with its cost of running. Lamp: 400W Halide Lumens: 38,000 Efficiency: 95 lumens per watt Cost per 12 hours@ 8p a unit: 38p Lamp: 400W Sodium Lumens: 53,000 Efficiency: 135 lumens per watt Cost per 12 hours@ 8p a unit: 38p Lamp: 600W Sodium Lumens: 92,000 Efficiency: 153 lumens per watt Cost per 12 hours@ 8p a unit: 58p Lamp: 1,000W Halide Lumens: 115,000 Efficiency: 115 lumens per watt Cost per 12 hours@ 8p a unit: 96p Lamp: 1,000W Sodium Lumens: 140,000 Efficiency: 140 lumens per watt Cost per 12 hours@ 8p a unit: 96p Happy Gardening!!! MadagascarX 6 Link to comment Share on other sites More sharing options...
oldtimer1 Posted February 6, 2003 Share Posted February 6, 2003 Thanks that is really helpful do you know the lumen output for 600w halides? It would also help to have the make of each lamp quoted. Link to comment Share on other sites More sharing options...
MadagascarX Posted February 6, 2003 Author Share Posted February 6, 2003 hi OT, Sorry mate, These are based on the Philips SonT+ and HPI Halide light. I don't know for sure the lumen output on the 600W Philips Halide, ..I'm not sure if they actually do one. I know the Venture 600W halide produces 50,000 lumens. Link to comment Share on other sites More sharing options...
Jessiedog Posted February 6, 2003 Share Posted February 6, 2003 Reposted from two other threads: No responses yet. Can anyone help? I am buying Japanese made, cool white (called "daylight") 24w (120w equivalent) compact fluro's - 3 for HK$90.00 (about seven pounds fifty). They are rated 6400K and and are bright as buttons. I also have the option of getting either "warm white" at 4200K, or "warm" at 2700K. Neither of these seem to chuck out anything like the same amount of brightness, but are, obviously, a more orangey colour. There was a thread about the different "K's", but I couldn't find it. Can anyone remember where it is, explain what "K's" are, or direct me to a link learn more about the "K" thingy? And can someone let me know (for flowering with fluro's) which would be better. The warm only - 2700K, the warm white only - 4200K, a mixture of those two, or a mix of all three types including the daylight at 6400K? The ones I use at the moment, put out so little heat, I can get them very close to the plants (currently 6X24w daylights = 144w). For flowering, could I simply add six of the warmer ones to the game and hence keep the daylights, but with a total of 288w of compact fluro light? I could also arrange the lights at different levels, both above and among the plants to improve penetration since they are so cool. Whatdaya all think? Thanks. Woof Link to comment Share on other sites More sharing options...
penfold911 Posted February 6, 2003 Share Posted February 6, 2003 Hi Jessiedog Hope this helps The higher the color temperature, the more 'blue' the light, and the lower the color temperature the more 'red' the light. Color temperature of light can be measured in degrees Kelvin (K). Daylight has a color temperature between 6000 and 7000 K. The color temperature of artificial light is much lower: approximately 3000 K. In reality, color temperatures range from 1900 K (candlelight) up to 25,000 K (clear blue sky). Television is set to 6500 K, simulating 'standard daylight'. Color 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 color 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 This is a great file to read about the gro-lux and other lights: http://www.sylvania.com/forum/pdfs/faq0040-0800.pdf 4 Link to comment Share on other sites More sharing options...
Jessiedog Posted February 7, 2003 Share Posted February 7, 2003 Hi pen, Thanks! That's exactly what I was looking for. Now! Can you explain what it all means? "And can someone let me know (for flowering with fluro's) which would be better. The warm only - 2700K, the warm white only - 4200K, a mixture of those two, or a mix of all three types including the daylight at 6400K? The ones I use at the moment, put out so little heat, I can get them very close to the plants (currently 6X24w daylights = 144w). For flowering, could I simply add six of the warmer ones to the game and hence keep the daylights, but with a total of 288w of compact fluro light? I could also arrange the lights at different levels, both above and among the plants to improve penetration since they are so cool." We're talking fluros here. I already understand HPS. Oh! And what is the "Caution" about? Thanks and blessings. Woof Link to comment Share on other sites More sharing options...
MadagascarX Posted February 7, 2003 Author Share Posted February 7, 2003 Hi JessieDog, All the info you need can be located here. In the link below. http://www.overgrow.com/faq/browse.php?qa=588 Hapy gardening MadagascarX Link to comment Share on other sites More sharing options...
Dr.Sativa Posted February 7, 2003 Share Posted February 7, 2003 Hey jessie Dog I'll help you out. It's actually quite easy. Start your seedlings with as close to daylight as possible. 6500k(daylight) is best right up till you start flowering. then change your bulbs to a redder spectrum for flowering. If you use HPS you will find that your temp in kelvin drops right down to about 1900k, which is perfect for flowering. Or if you are staying with floros(not advisable, far less bud at the end) you must change your tubes to 2700k when flowering. Stay high Dr.Sativa 1 Link to comment Share on other sites More sharing options...
Jessiedog Posted February 7, 2003 Share Posted February 7, 2003 Thanks peeps. So, if I were going with compact fluros for flowering then, I'd be better off using all 2700K, rather than a mix of 2700K and 6400K. Is that right? Or should I just add additional 2700K's to the existing 6400K's? Also, would having some of them hanging down among the plants increase light penetration? Thanks. Woof Link to comment Share on other sites More sharing options...
Bish Posted February 7, 2003 Share Posted February 7, 2003 Just go & get yasen a decent HPS & stop messin' about! Link to comment Share on other sites More sharing options...
Jessiedog Posted February 7, 2003 Share Posted February 7, 2003 Just trying to expand me knowledge Bish. Keep yer 'air on! Woof 1 Link to comment Share on other sites More sharing options...
UFO Posted February 7, 2003 Share Posted February 7, 2003 Hi, You can also get really good info on lights, lamps etc at RSonline, sorry havn't got the link But seem to remember some new double HID lamps being available, which effectively double the life of your lamp, for just less than double the price, handy I think i had to register(free) to get access to the technical data sheets, which means i must still have access......i'll go and do a search and try and copy a link Which is a major technical feat in my present stoned state ufo Link to comment Share on other sites More sharing options...
Mind Your Head Posted February 7, 2003 Share Posted February 7, 2003 RS Components Tks for the info MGX, Can anyone give me the low-down on 400w mixed spectrum bulbs. Are there different types? Are they always 430w. Cheers MYH Link to comment Share on other sites More sharing options...
Highlander Posted February 8, 2003 Share Posted February 8, 2003 I think what size grow room u got & then extraction is important. Link to comment Share on other sites More sharing options...
UFO Posted February 9, 2003 Share Posted February 9, 2003 Mind Your Head, Nice one mate! ufo Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now