It is liked by many due to its quality light. Metal Halide and Sodium Vapour are discharge lamps, much like a fluorescent tube, where the gas is the lamp is glowing, rather than a filament like with halogen. CRI for LED is dependent on the particular light in question. Metal halide lamps last about 15,000 hours, and HPS bulbs can last up to 24,000 hours. They lose roughly 15% of their heat emissions which adds to their inefficiency. When you buy this, you get one metal halide grow light, one HPS grow light, hanging kits to ensure that you are able to hang your grow lights properly, one reflector hood to enhance the efficiency of your light and to increase the coverage area, a ballast in which these bulbs can fit in – and lastly a programmable timer. • HPS is about twice as electrically efficient as metal halide. MH vs HPS. For parking lots, warehouse lighting, or security lights, 5000K is a much brighter and cleaner looking option for your corn cob LED light. When it comes to the functioning of these two bulbs, the MH grow lights and HPS grow light bulbs function on pretty much the same principle of an electric arc being passed through some gases. One of the biggest advantages to growing with LEDs as compared to growing with High-Intensity Discharge (HID) bulbs like High-Pressure Sodium (HPS) and Metal Halide (MH) bulbs is that LEDs consume a fraction of the electricity of an HPS or MH bulb. For a more detailed look, check out my in-depth article on ceramic metal halide lights. MHs have been used in growing cannabis because they emit a strong blue wavelength, which helps the vegetative phase of growth. Brand new, fresh out of the bag metal halide fixtures have an initial output of about 100,000 lumens per 1000 watt bulb. For comparison purposes, the only disadvantage I can think of CMH over MH is the initial cost. So, even though you have a 1,000 watt metal halide fixture, you will not need to replace it with a 1,000 watt LED fixture. These types of lighting are more efficient than halogen but their useful life peaks very quickly, and their performance deteriorates after a few hundred hours. Blue regulates internodal distance (the distance between branches). About 24% of the energy used by metal-halide lamps produces light (65–115 lm/W), making them substantially more efficient than incandescent bulbs. A: Lumens is an antiquated way of comparing grow lamps. Traditionally growers used Metal Halide (MH) bulbs during the VEG cycle due to the high percentage (23%) of blue in the MH spectrum. Metal halide lamps generate a white light between 3000K and 5000K. MH, or Metal Halide, and HPS, or High Pressure Sodium, are two types of High Intensity Discharge lights that give a brighter effect, and also help to save energy. The key difference between halogen and metal halide is that a halogen is a group 17 chemical element, whereas metal halide is a compound containing a metal and a halogen.. Metal halides are ionic or covalent compounds of halogens. While the technology behind indoor plant lighting has evolved rapidly, one thing has stayed fairly constant: Most growers still prefer to use high-intensity discharge lights in their grow rooms. They offer high efficacy, excellent color rendition, long service life and good lumen maintenance. Metal Halide (MH) Metal halide is a HID style grow light. It provides its light from the electric arc and through a very tiny discharge tube. They are less effective during the vegetative stage, however, which means purchasing separate blue-colored bulbs – usually metal halide. G8LED grow light reduce electricity by 40-50%. • Photosynthetically Active Radiation (PAR) is what really matters to plant growth, and delivery of usable PAR is better with HPS than metal halide. Spectrum comparison. We are testing the top rated LED fixture vs the top rated 1000W double-ended HPS fixtures at our Medical Cannabis grow in Northern California. by Garrett Rudolph August 1, 2014. written by Greg James August 1, 2014. It is a better light than high pressure sodium. yet. Metal Halide are a good source of high CRI white light. What is the better choice between LED vs HID grow lights? Because of their numerous advantages, metal halide lamps are used extensively in outdoor applications and in commercial interiors. Re: 400W Metal Halide vs 400W HPS « Reply #6 on: January 09, 2015, 10:36:29 AM » Author: nicksfans I would either keep using 400-watt MH or MV lamps or change the ballasts. This is a quick take on MH vs. CMH lights. It comes in a wide range of wattages, from 250 to 1,000. I have noticed that the Ceramic Metal Halide HPS Retro bulbs produce less lumens compared to other HPS bulbs? (*Note: LED's range in wattages and structure. Metal halide lamps are a form of the light source that creates light via passing an electric arc through a gaseous mixture of mercury vapor and vapor of some metal halides. HPS Vs CMH Vs LED Should you upgrade from HPS and MH to CMH or LED? As plants reach the flowering/fruiting stage the HPS spectrum enhances the quality of fruit and a larger harvest. This is the hardest part for people considering trying the CMH's to get past. Different lights will produce more or less heat.) A halogen is a chemical element and all the elements in the group 17 of the periodic table are known as halogens generally. I have read that Metal Halide is better to Veg with than a HPS and I just wanted to put my feelers out there and see what you guys think. Metal halide vs. high-pressure sodium: An age-old question for cannabis growers. However, there are a number of differences between the two as well. Compared to halogen light bulbs that last about 6,000 hours, it is a significant difference. I am about to buy a combo (hood, digital ballast, and bulb) and they have a deal where I can get a metal halide and hps for 45 bucks more. My advice by and run them both. 1.) Thinking about a little indoor gardening this winter? Most of the times, the metal halides are compounds containing bromine and iodine as the halide component. A metal halide lamp is an electric lamp that illuminates using an electric arc with a gaseous mixture of mercury vapor and metal halide compounds. As we mentioned earlier, the wattage of the metal halide does not correlate with the wattage of an LED. The bulbs in this family produce a large amount of lumens, which is … A CMH uses a ceramic arc tube similar to those used in HPS grow lights instead of the quartz used in traditional metal halide grow lights. HPS grow bulbs produce the yellow-red light ideal for the flowering phase of your grow. To give you a rough idea of how long that is, halogen light bulbs are what are used for headlights in cars. As a general rule of thumb, HID grow lights like Metal Halide (MH) and High Pressure Sodium (HPS) are most suitable for relatively larger grows where there is at least 5 feet (1.5 meters) of height in the grow space, though it’s recommended to use a taller space for the best results.This is because MH/HPS lights have to be kept fairly far from the plants. Spread and Intensity of Light Omnidirectional. Although incandescent lamps cost less initially, metal halide lamps offer […] Lumens are a scientific definition based on the human eye and NOT on a plants response curve. Metal halide bulbs, sometimes shortened to just “MH” and high pressure sodium bulbs, sometimes shortened to simply “HPS”, are in a family called High Intensity Discharge bulbs, or “HID” for short. And you definitely shouldn't be paying $44 for a 400W MH lamp. Like Metal Halides, High Pressure Sodium lights are omnidirectional, which wastes light and makes them less efficient. MH grow lights (metal halide) are suited best for vegetative growth and HPS grow lights are superior for flowering. LED vs HPS, MH (HID) Grow Lights. Ceramic Metal Halide grow lights are basically a variation of MH grow lights with a little of HPS added into the mixture. On average Metal Halide bulbs typically last for 1.5-2 years of 18/hours a day. Studies have shown that the blue wavelength in light increases the overall growth of plants. HPS light costs differ based on the particular fixtures, but are cheap compared to LEDs. How it Works: The lamp uses mercury vapor to create the powerful light (like the high pressure mercury vapor) but includes other metals (halide salts) to improve the color.. A Halide is a chemical compound of a halogen combined with an electropositive element, or in the case of lamps: a metal. A halogen is a monovalent element which readily forms negative ions. The light produced by HPS bulbs is … The HPS spectrum mimics the outside autumn light increasing the plants demand for light. Common metal halide to LED replacements: Sodium Lamps: High-pressure sodium sources were developed primarily for their energy efficiency. Metal halide: 90 lumens/watt High pressure sodium: 107 lumens/watt Metal Halide (MH) Metal halide lighting systems are optimal for use in the vegetative phase of growing. The HPS will put out probably more weight but ceramic metal halide going to give you a healthier and more oil rich product. • The enhanced blue in metal halide does not lead to increased plant growth compared to HPS in the “veg” stage. Color Rendering. Metal Halide vs. Well, both these lights have specific characteristics that … Difference Between Metal Halide (MH) vs HPS Grow Light Bulbs . Which do you use or prefer and what is your reasoning behind it. First of all, remember that although similar, CMH and MH are not the same. The warmer 3000K light is a great way to simulate 3000K metal halide lamps like the Philips MHC100/U/M/3K or ALL high-pressure sodium lights. However, ceramic metal halide bulbs run a lot cooler than MH and HPS bulbs by about 8°F. Outstanding light quality, exceptional reliability & environmental compliance – ultra-efficient HID Lights from GE. The unique technical characteristics of metal halide lighting consistently outperform incandescent, mercury, HPS and fluorescent alternatives. Metal Halide vs. Incandescent A 100 watt metal halide lamp provides five times the lumen output of a 100 watt incandescent lamp and it will last 20 times longer. GE's High Intensity Discharge lamps (HIDs) share a number of important qualities – including high efficacy and a long life – that combine to make them the most efficient light source for a wide range of different commercial and industrial applications. Both the MH and the HPS are widely used for outdoor lighting. 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