What is the color wavelength of the blue. The other LED's I have are 470 nm.
395062
They are 470 nm. I bought 2 of them for the rear of my pontoon boat and love them. Great water seal for below surface. I do recommend using a type of silicone around the base of the wire if your using the mount. just because I'm always over the top in protection.
1488536
100W JD E11 Mini Candelebra T4 Halogen...the base is E11 - do not know if there is an LED equivalent.
476225
It provides enough light but is way too blue. I prefer 2700K color temperature which is close to incandescent.
759054
It's really hard to speak in terms of "watts" when addressing LEDs. It always comes down to lumens. I have the 24-36 Inch Marineland light and it keeps my moss balls quite healthy. This is due to the Blue light providing the specific wavelength required for vegetative growth. Rather than going forward in terms of "watts", calculate the lumens generated by the 120 watt you're told you need...then calculate the lumens generated by the lights you have and fill in the blanks with add-on modules.
1573654
LED type: Bridgelux · Size: 400x212x62mm · Packing size: 455×295×105mm/1pc · LED wavelength: . white: 14000k-16000k . Blue: 460nm · Working environment: -20 to 40°C · Storage condition: -40 to 85°C · Lux (center): 138/2.5m, 95/3m, and 65/3.5m · Luminous flux: 6000lm · Lighting time: 10 - 16 hours · Lifespan: 50,000 hours Complete Filtration Services Inc
898185
I think he is referring to the ratio of 660nm LEDs to 630nm LEDs. (The 630nm LEDs are usually cheaper than the 660nm LEDs.) There are many more factors, that go into selecting LEDs.
860531
This is right question. It is much more bluish than 5500K, I think it is about 7000-7500K. I hope it will help you.
326072
I cant tell you the specific's, but they have 12 led's and are the brightest I have seen. I have bought many looking for ones this bright. Working great for 6-7 months now.
2185905
Hi Sandy - I have this light - works great, can select RGB colour combination you want by using the on/off switch (easily) - I love the cobalt blue fading to sky blue and back (there are 18 colour settings/fades). Not sure what your question is, though! Uses 17.5 Watts instead of 300W, 12 volt, so I keep it on much more than the old light at a fraction of the environmental cost. Love it. There's a 512 led bulb too, but my 40ftx26ft pool is well lit with the 256. Hope that helps.
1191140
180 ohms for the green and blue 270 for the red. The green and blue Led's require a little less voltage than the red one. The red led has an ~1.8V drop. The green and blue have about 3.0V drop assume a 180 ohm resistor sets the green and blue Led's @ 11 mA and the 270 ohm resistor does the same for the red led. These were my calculations for the red = ~1.8V / 270 ohms = 0.0118 A or 12 mA and Green-Blue ~2V / 180 ohms = .0111 A or 11 mA. The resistors are based on 5V Vcc. If you are powering them from 3V3 the red is 180 ohms and the green / blue is 120 ohms. The ohms law formula I used was I = E/R and the values are the ones I use in practice.R K Johnson Sr. 180 ohms for the green and blue 270 for the red. The green and blue Led's require a little less voltage than the red one. The red led has an ~1.8V drop. The green and blue have about 3.0V drop assume a 180 ohm resistor sets the green and blue Led's @ 11 mA and the 270 ohm resistor does the same for the red led. These were my calculations for the red = ~1.8V / 270 ohms = 0.0118 A or 12 mA and Green-Blue ~2V / 180 ohms = .0111 A or 11 mA. The resistors are based on 5V Vcc. If you are powering them from 3V3 the red is 180 ohms and the green / blue is 120 ohms. The ohms law formula I used was I... » Read More 180 ohms for the green and blue 270 for the red. The green and blue Led's require a little less voltage than the red one. The red led has an ~1.8V drop. The green and blue have about 3.0V drop assume a 180 ohm resistor sets the green and blue Led's @ 11 mA and the 270 ohm resistor does the same for the red led. These were my calculations for the red = ~1.8V / 270 ohms = 0.0118 A or 12 mA and Green-Blue ~2V / 180 ohms = .0111 A or 11 mA. The resistors are based on 5V Vcc. If you are powering them from 3V3 the red is 180 ohms and the green / blue is 120 ohms. The ohms law formula I used was I = E/R and the values are the ones I use in practice.R K Johnson Sr. « Show Less
128693
Hi, this LED is with Red light (630nm), Blue light (470nm) and Yellow light (590nm). Yellow light is for skin rejuvenation, stimulating production of collagen, improve sensitive skin, anti-aging. The Blue light is for acne curing, comfort skin, pain relief... and the Red light is for improving renewal of skin, stimulating skin regrowing, diminishing inflammation...etc. Hope this help you.
980661
Whoops! Unlike GeorgeM (who really knows his instrumentation), you're confusing colour temperature (5000K, 6000K) with light output (Lumens, spherical candle power). Cheers!
1931020
60 Hz Full comparison is here http://www.tomshardware.com/reviews/vp2770-led-s27b970d-review,3426.html
23491
I have no idea. I will say this light favors the white side of the LED color spectrum more so than the 3000K advertised. I use it above our kitchen sink. Being that this light is super cheap, I'd give it a shot.
1863703
I decided not to purchase this bulb; I went with a Bulbrite LED globe light instead. But....from the research I've done online, 3000K is in the warm range so it should give off a warm, slightly yellow color - as opposed to the 5000 to 6000K light which are cool and decided bluish in color. The Bulbrite light I bought is also 3000K and I like it very much but I prefer the warm light glow as opposed to cool. Hope this is helpful
746482
They're blue LEDs on TT branded fans. one is 200mm, one is 120mm, and another is 180mm. If you'd like to get them in white, you'll have to replace them yourself. The top and front will house a fan of 200mm each, but 2 120's will suffice.
940703
HI Stew. I used 200ohms to drive 4 RGB leds in parallel with source of 9volts. All four connected to same resistor. I haven't measure current or voltages but they bright pretty good. let me know if you need any measure.