plis, Brightness: Lumens ????
766666
Yes Lumens are a measure of brightness. This link answers a lot of questions http://www.projectorcentral.com/projector_faq.cfm
766667
It should be somewhere in the description. It's plenty bright in my theater. However I blocked out all light from my theater and painted the walls dark blue.
1881232
The Luminous Intensity for this kind of light is around 90-100Lm/W. Then you can calculate the output lumens as the wattage you need.
2128351
Don't know about the actual "lumens" but, I bought these out of frustration with my previous Philips Sliverstar lamps that gave me only 15 months of life. And, that was after two complete sets of the Philips product.So far, I'm on my 3rd year of life on this set of GE Nighthawks, and their brightness seem comparable to my previous Philips Silverstars. Hope that helps.
215392
Hello Light waves, With no spec for lumens or CRI on Amazon, I'm almost as much in the dark (NPI) as you. However, I've had one of these running in a decorative spotlight for a few months, so I can make some comments. The color of the light is much better than a CFL, but not as nice as incandescent or the legendary Philips L-Prize bulb. Comparing it with various Philips and Cree LED bulbs that I'm currently using, I'd say the CRI is probably around 80, certainly no better than that. That's just an eyeball estimate though, YMMV. Brightness is roughly equivalent to a 25-30w incandescent bulb. If you use it in a reflector spotlight (I'm using it in an old boat searchlight - the reason I needed a bulb with a BA15D base) it makes an odd but interesting pattern on the wall because of all those individual LEDs spread over a large area. It doesn't dim very well, even with a PWM dimmer specifically for LED lights. However, after my initial experiments, and given it's modest light output, I never attempt to dim it anymore. You probably already know this, but just in case, be aware that this bulb has a BA15D (both bayonet pins at the same height) base. This means you can put it in the socket backwards and it will not work (I've done this a few times, it didn't destroy the bulb). Many bayonet base LED bulbs on the market use the BAY15D base (pins at different heights), preventing it from being inserted backwards. I have found the descriptions - even on Amazon - to be wrong about the base type occasionally, so always look at the pictures carefully to be sure the base type is what you need.
2134871
Yes. There are three levels of brightness. The brightest one is almost too much. I use level 2.
896139
LED luminosity is directly proportional to voltage but 100+ lm/watt is stretching things, even for the best LED arrays, which this is not. Lumen output is probably no more than 75 lm/watt and that would be at the maximum rated voltage.
605508
That happens sometimes. Hit shift (2nd) and the arrow up to increase the brightness. Keep doing that until you can see the numbers.
460921
It's not very bright at all. In fact I was very disappointed with the amount of lumens actually put out. I'm thinking of replacing the two that I purchased because they're just not doing the job.
387104
42 Lumens. Its quite bright. Meaning, don't stare directly into it (unless you enjoy going blind) - kind of like the sun except smaller. Technology is amazing, this includes the internet.. love your work Mr. Draper.
293009
The info. I got was 500. I have no way of testing it. At 500 or 600 its still super bright. I saw a test where it beat a 800 lumen light.
139671
Don't know in terms of lumens but general light output is reduced nearly 50%
643169
I have no idea the lumens but being a daylight ~6000k light it looks a whole lot brighter than the standard bulbs it replaced and everyone at the camp sight wanted some.
1134260
All I can find is that is tis 27 watts, can't find the lumens, Sorry. Jayne
584943
I think the output is about 16,000 lumens -- see ultrasunlamps com --> http://www.ultrasunlamps.com/1798
2050088
I have a white LED light that is supposed to be 500 lumen but it is actually 300 lumen, mounted as a shooting light. I can throw a small beam to 200 yds easily. That is as far as you are going to shoot at night. My red led is used for scanning. Very hard to see the crosshairs with red.
1546166
thank you for the questionactually I returned it back as it didnt match my requirements using it in big room, regarding resolution and illumination (lumins units)wish to help you more :)
2097869
I wouldn't worry about the Lumens. I returned them because out of the whole box only one worked. I wouldn't recommend them.