400w Club-Show Off Your 400w Pride And Joy

What up everybody this is my NL5 @ 42 days in flower. I'm using a 400 Watt MH Sun Pulse bulb rated @ 3000K. It's fairly new on the market and they claim it's equal to or better than an EYE Hortilux bulb. This is fairly new technology so I thought I would give it a try. So far so good the ladies are coming right along.Enjoy.
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400W Eye Hortilux with supplemental CFLs

what are some good flowering mh bulbs out there that dont need pluse start? or how could i turn my light into a pluse start ballast?

What is the difference between probe-start and pulse-start lamps?

Traditional metal halide (MH) lamps use probe-start technology. Three electrodes are present in the arc tube of a probe-start MH lamp: a starting probe electrode and two operating electrodes (see Figure 2). To start the lamp, a discharge is created across a small gap between the starting probe electrode (also called the starter electrode) and the operating electrode. Electrons then jump across the arc tube to the other operating electrode to help start the lamp. Once the lamp is started, a bi-metal switch removes the starting probe electrode from the circuit.
Figure 2. Probe-start and pulse-start technologies Each time a MH lamp is turned on, tungsten sputters from the electrodes. Over the lamp life, this tungsten can cause the arc tube wall to blacken, thus reducing performance of the lamp.
Pulse-start MH lamps do not have the starting probe electrode (Figure 2). Instead they have a high-voltage ignitor that works with the ballast to start the lamp using a series of high-voltage pulses (typically 3 to 5 kilovolts). Without the probe electrode, the amount of pinch (or seal) area at the end of the arc tube is reduced, which results in a reduced heat loss. Furthermore, using an ignitor with a lamp reduces the tungsten sputtering by heating up the electrodes faster during starting. Warm-up time is also reduced. Pulse-start technology was developed to increase lamp life and to have both the energy efficacies of high-pressure sodium (HPS) lamps and the desirable color characteristics of MH lamps.
Pulse-start technology is not new; it has been available in low-wattage MH systems for years. Manufacturers claim that pulse-start systems achieve the following:

• Provide longer lamp life of up to 50% over traditional MH lamps.
• Increase lumen maintenance by up to 33% (see the lumen maintenance section of "What are some important characteristics of MH lamps?").
• Provide better cold starting capability-these lamp-ballast systems will start at temperatures as low as -40°C (-40°F)
• Allow faster starting when cold, shorter warm-up times, and a faster restrike (re-start).

Table 1 compares the probe-start and pulse-start lamps and presents some of their important characteristics such as lamp life, initial light output, mean light output, ballast type, and color. Each lamp described in the table represents a category of products by that manufacturer, not single products. For the revision of this publication, NLPIP tested eight groups of six lamps each, representing four types of MH lamps. Comparisons were made between 320 W pulse-start and 400 W probe-start MH lamps, as well as between 250 W pulse-start and 250 W probe-start MH lamps.

#1accordfamily said:

what are some good flowering mh bulbs out there that dont need pluse start? or how could i turn my light into a pluse start ballast?

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Pulse start bulbs were designed to work with digital ballasts.

hi guys. i got my first 400 watt mh the other day. is hooked up and running 18/6. the only thing is im having heat issues now. i have a lowe's 6 inch inline fan and a crapy ghetto build reflector. how many cfm do i need to keep the temp down in my closet? my closet is about 85 cubic feet. im using the bottom 3 feet for something else. so my plants are about in the middle verticly. do i have to get them closer to the floor? or do i need a better hood and inline fan? thank you for any help.

Sounds like you need a better hood and an inline fan. Also I think we have a similar grow space. Check out my sig if you need some Idea's.

how many cfm inline fan do i need for my closet? i'm going to make a better hood as soon as i save some money up, or make a cool tube. just need to find a place that sells the glass cheap.

Well I use a 530 CFM inline for mine, plus two 60 CFM hydrofarm blowers. If you want to make a cool tube you can find the glass you need here.

http://shop.ebay.com/?_from=R40&_trksid=p4712.m570.l1313&_nkw=bake+around&_sacat=See-All-Categories

Also here is decent tutorial on how to make one.

https://www.rollitup.org/grow-room-design-setup/121080-diy-cool-tube-how.html

Or I've seen some people use hurricane glass for oil lamps to make cool tubes.

wow that is exactly what i was looking for. only one problem. my 400 watt mh bulb is about 5" wide. i dont see a 6" or bigger round tube. thank you. + rep

Bubba Kush out for a walk and water.

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The tallest is 19 inches.

should i look for a 6" or 7" round glass? or make a hood using some type of flat glass or lexan on the bottom?

redrum83420 said:

should i look for a 6" or 7" round glass? or make a hood using some type of flat glass or lexan on the bottom?

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http://htgsupply.com/Product-CoolTube-6in-Reflector.asp

Here dude, 99 bucks plus shipping, 6" cool tube. Booya.

My 6" air-cooled hood with tempered glass was only $125 or so from the local over-priced hydro shop.

well checked what i had for money and had a little more then i thought (for once) so i went to my local hydroponic shop and bought a sunspot6 reflector. i changed the cord to the socket tho because i have a old mag ballast. so it was easyer then cutting the brand new cord. i'll keep it just in case i need it or buy a better ballast. here it is:

Not necessarily proud, but joyous indeed. Here's my crowded homemade 2'x3' grow armoire under a 400w HPS (yeah, sorry 'bout the yellow pic, at least it's not full of lines) under 6" air cooled hood. I have 1 J-1, which is the stretchy girl in the back, and 3 purple kush diesel. The J-1 is the bomb, def after work smoke, took one hit before I started this post and am having trouble typing. My first time with the PKD, hope it turns out nicely. Thanks for looking.

redrum83420 said:

well checked what i had for money and had a little more then i thought (for once) so i went to my local hydroponic shop and bought a sunspot6 reflector. i changed the cord to the socket tho because i have a old mag ballast. so it was easyer then cutting the brand new cord. i'll keep it just in case i need it or buy a better ballast. here it is:
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Hell yeah, that's what you need right there. I just bought a new hood myself but I got to wait on the delivery.

i would have rather made my own air cooled hood but its worth the 130 plus tax. i needed it real bad. doing temp test now with new hood and 6" lowe's inline fan. but i dont think the lowe's inline fan is going to cut it.

Hey Chronic just set up my htg 400watt with agro light for added blue spectrum, till now ive been using merc. vapor, cfl's and daytime sunlight, lot o work, not bad results. This will be my first completely indoor grow. Space is limited, grow area is 4'x5'. Normaly I would do 6 clones and would veg 4 to 6 weeks bofore flowering 8 to 10 weeks would yeild approx.2.5 oz. each. I'm trying a different approach to try to max my space. after my cuts finish rooting i'm gonna try to fit 20 clones.Ill veg. for 1 maybe 2 weeks then 12/12 hoping to get around 1oz.each .Wish me luck ill keep you posted. GOOD LUCK!!!

Hi all
heres a couple pics of my 400w baby
shes starting her 8th week