240mh or LED: Which will be best in the long run?
1454836
it depends on what you use it for. It wont make any difference with gaming because the 240 hz refresh is disabled. you will notice a difference with fast moving scenes and sports displayed in HD. You can get a un46b8000 or un55b8000, both are 240 HZ LED tv's with very good picture quality. They are cheap right now as well because the new 2010 models are out.
1535934
It's your call, this LED lamp is very bright but will never reach the same level as a halogen lamp, but if ambient heating from halogen + higher electrical expenses are not as important as brightness, stick to the halogen. With LED you get a good result, less ambient heating, probably higher bulb lifetime and you will spend 8 times less for energy with light. The big difference between both is the spreading of the light beam.
1931020
60 Hz Full comparison is here http://www.tomshardware.com/reviews/vp2770-led-s27b970d-review,3426.html
64171
4 ms according to http://www.viewsonic.com.au/products/lcd/VX2370smh-LED.php7 ms according to http://www.viewsonic.com/us/vx2370smh-led.htmlApparenlty the manufacturer isn't even sure...so we will never know... :/
2071954
I have to go with the 230 lumens. Its very bright. You don't want to run it to long on that high setting.
385188
The MR16 LED listed is 320 lumens which is equivalent to what I was replacing as a 50W halogen. The difference is that the LED is more focused as a light beam and was brighter on my display floor that the halogen bulb. So overall, I saved a lot of energy and heat. More importantly, I was able to buy a few more track light fixtures and added two more LED bulbs for a much even/better light distribution on the floor area for the retail store. I hope that helps.
1235507
I have both the G8LED 240watt for vegetation with the 90watt red LED as to enhance flowering. They are 120 volt. I switched from 400 watt metal halides.... They are cooler and just as productive, if not better. I love them and am going to purchase more this year. Hope that helps . -Pete
542217
The LED will operate on AC. You can choose any model LED that will fit into your application.
444313
look for Buck Block at LED Supply. This big boy will supplement your 36volt supply to provide the constant current drive these LEDs need to stay happy. Be aware you will need a humongous heat-sink or forced air cooling to actually use this. And 8-9000 Lumens is a LOT of light. Most real life applications don't need that much light output. It's a fun toy though :) (Yeah, I bought one!)
1902181
If there are no E or I regulating components other than the LED, the double cell NiMH will be sufficient to overcome the threshold Voltage, but the current and thus the lumens will be less. Just guessing, but 3.0 V might produce twice the lumens of 2.4 V and twice the current. Compare LED threshold/ forward Voltage with forward current. This will vary with the LED color, too.
772283
This Illuminator has around 200 LED's. If you have never replaced an LED you need equipment, like tiny soldering tip, tiny tools, and the ability to work in small areas. I have one of these illuminators. If all LED's were blown by something like lightning or power problems, I would not attempt a rebuild. If just half a dozen have blown, you will not notice the difference in lighting, so would not work on them. I frequently change out the colored LED in computer fans ( most lit ones use 4 LEDs ). I buy the colored ones from Amazon, but do not remember the cost, which means I did not scream about the high price, which I often do. They are fairly cheap, as I remember. Never have worked with Infrared LED, just visible light models. This illuminator requires 850 nanometer, which I have no idea of cost. Just check Amazon. They have a 10-pack of 850 nm units for $ 2.56. Be sure to read the customer comment. My engineering experience with LED's occurred when the LED just came to market. Not much has changed except a very large price drop in the last 50 years. Not all LEDs are the same circular size. I have to watch that when changing colors on computer equipment, like the colored fans. Oh, when working with soldered-in like these, you do need a motor operated vaccuum pump to quickly 'suck' the solder out just as it goes liquid. Those hand operated units, like the "solder sucker" are too cumbersome to get into that circuit board. I built my solder sucker about 30 years ago, for I do a lot of unsoldering on really small parts. Must admit I have never taken my illuminator apart to see how it is put together. If I had around 25 or so of the LED's shot, would probably order a new one, take the faulty unit apart to study the construction, then save all the LED's for the next time. The LEDs I have used from Amazon have been quite hearty, ie never broke one, nor melted one. I should tell you to forget fixing the unit, HOWEVER if it were mine, I gotta fix it. Good Luck
2038139
The Cree LED has a usual lifetime of many thousands of hours of continuous use. The casing or circuitry is more likely to fail first.
1569718
I would say a lot more. A 40W equivalent LED bulb ranges from consuming anywhere from 5W - 7W. That's about 8x more consumed power.
208951
My personal thought would be to go with the "whiter" 3000k. If you put a dimmer on the switch, it really won't be an issue as the brightness will be adjustable.
2197010
In fact you will see a change .I cant say if the LED lights 70 lumens bit for sure its much better than the incandecent one. Its a white light so as i can see this helps a lot as an improvemet .
1562880
I am using the very expensive LED's. These are very efficient and are supposed to last a looong time. For the initial price they need to.
70767
It wouldn't hurt. Id go with the planted plus. It has 660nm red leds and slightly higher par values