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this is the lamp i use in my grow - i actually use the 575 watt, but this 250 has the same benefits http://www.venturelighting.com/LampsDataSheets/NaturalWhite/59324m.pdf it has a quartz shield on it so you don't harm your eyes from the u.v. also, check the spectrum: just like the sun, but in a...

seestyle, just look up the manufacturer's spectrum for CMH. Notice how it is just like the sun, almost straight across. A regular metal halide has a blue peak, a green peak, a yellow peak, an orange peak, and a very little red peak. It is obvious that CMH has a monsterously bigger output in...

The chart in the article didn't come out with my cut and paste: warm white fluorescent, 48" 40 watts 45 pgl/watt metal halide discharge 50 watts 3000 initial lumens 1890 PGL = 38 PGL/watt HPS 35 watts 2240 initial lumens 1534 PGL = 44 PGL/watt When you look at...

Hi, the way to tell how many plant lumens you lamp is giving you, is to read the literature on the internet: This article shows the difference between HUMAN EYE lumens, and PLANT lumens, two totally and completely different things. Notice how blue light is important source of plant lumens, but...

CMH is a much better growing lamp than a Metal Halide because it produces much more PLANT LUMENS per watt, and is still very rich in blue and violet that will keep the plants stocky and bushy. The spectrum is just like the sun and you will get results just like you're growing in an open field...

We just finished a huge discussion about this on this forum. When vegging, you want your plants to be stocky and bushy, and the very high blue content of either a metal halide or a CMH promotes this, the "skeleton" of the plant. A metal halide lamp running on an HPS ballast though, doesn't have...

Buy yourself 2 x Phillips Ceramic Metal Halide 400w horizontal lamps. They cost $53 each, or even $48 if you check the CMH thread. They are much better for veg. and they tolerate being run 24/7 which is ideal for veg. When you want your plants to bud, switch to 12/12, and after another week...

The point I was getting at was: 1. You made me do some research and I came up with a useful article not yet quoted, but demonstrates for sure what a PAR curve looks like, from an academic source, and not a commercial lamp salesman source, and real numbers that show how to convert a spectrum...

Really google is your friend. Where you need to go is google on converting spectrum to lumens. There is one curve for plant lumens, and another curve for human lumens. The lumens given by the manufacturer of the lamp is for humans. But there is a HUGE difference between plant and human lumens...

Ceramic metal halide has an extremely shallow lumen degradation, has excellent maintained lumens. Also CMH has loads of red. What I am talking about is optimizing, because obviously when the plants are small, they just can't physically use all the photons from a 58,000 lumen 400w lamp, but...

ceestyle, you must be stoned, or don't know how to read, your link shows the MH lamp STARTS at 32,000 in the horizontal position, but due to lumen degradation goes downhill fast. I've tried a conversion lamp, and the plant just goes yellow and shrivels up. there is no useless spectrum on a CMH...

Conversion bulbs have been around forever, but they're crap. MH conversion is anemic, I would run a CMH and get some real light instead of a conversion.

Actually, since CMH runs on an HPS ballast, you have the option, if you like for the last 2-3 weeks running a pure HPS lamp, and running the CMH lamp for the first 8-9 weeks, then judge for yourself whether one lamp is better than the other. At the present time, with the availability of a 53$...

I just placed an offer at $90 and it was accepted +$15 for the shipping, is a nice price for this really effective reflector.

The adjustable feature on these is really nice. You can use a wider or narrower spread depending on how much intensity you need. Also, the best offer is nice - since they come from China, probably you can get a good deal.

Oh I forgot to say, the Reflectorized lamp is HPS, get them from HTG supply. Best lamp there is - ALL of the light goes down to the plant - the just love it!!!

I use two Gavita reflectorized 400W lamps, with ONE Ushio Metal halide in between The results are great. Once I added the Ushio Metal Halide, the growth was spectacular. For the seedling stage, use a FULL SPECTRUM Phillips CMH lamp - the spectrum is just like the sun, and the baby plants just...

Welcome To Advanced Technology Solutions ~ Lighting Divison Is the place to buy them. They show a picture of the spectrum - it is exactly like the sun Huge amounts of blue and violet to promote nice bushy plants with loads of chlorophyll, and tons of red that chlorophyll really loves. The in...

Hi, my closet is 7 feet high. I only grow my plants about 3 feet tall or so depending on the strain.I use 3 gallon pots with pro-mix type of soil (peat, vermiculite, perlite), and you could probably grow about 8 plants in that space, depending on how well the pots fit together. I can get about...

Also, I was using 30 cubic foot per minute cooling, oversize computer fan. Should do the trick as long as u don't plan growing in mid summer, and you can supply outside fresh air.