Vycor

How many lux/lumen (actual) are your bulbs? I see it says "Street Legal Output" on the website, so are your bulbs less then 32 candle power at the hot spot?

Diode Dynamics

iTrader: (1)

Thanks for the questions! This diagram shows lux, which is the amount of light reaching the road in a specific area. The green dot/area is 25 lux (the "251x" label you mentioned is 25lx). The teal blue is 1 lux. 1 lux is about the amount of light that is required to make out objects at night.

"Lumens" is only a measurement of total light coming from a source. It is not related to the direction of light, so it wouldn't be possible to map lumens this way.

Basically...
lumens = total output in all directions. Good for measuring standard bulbs or home lighting (where you want light in all directions)
candela = total light pointed in a specific direction. You can say exactly how much light is going from the light, pointing towards 2 degrees below the cutoff, for example.
lux = candela+distance. Lux is the total light hitting a specific point a specific distance away. This is used on our chart because we are also showing distance figures. It's a simple calculation to convert from lux + distance to candela. Candela is the most common way to measure beam patterns, output, etc, because it is independent of distance. All automotive lighting regulations for lamps use candela.

1500 lumens come out of the stock bulb in all directions, but that doesn't tell you how the light is being directed and focused. Our bulbs produce nearly the same total lumen output, but it is more focused than the factory bulb, allowing more of the light to hit the road. If you look at the factory light, you'll see how the light coming from the top and bottom of the halogen bulb is wasted, and of course there's a big cap also blocking lumens. Our bulb makes use of the critical surfaces that reflect light to the road, rather than getting blocked in the headlight itself. And the lumen figure is highly controlled - we could run ours brighter, and we actually tested it at higher output, but we were introducing too much excess glare, it was no longer be compliant with the road-legal output pattern standards.

Maybe we should do a Facebook live video going over these measurements? Might be useful!

Vycor

So basically your bulbs are only putting out a max of 51 lux at around 75 meters??? Compared to the stock which gets a max of 51 lux at around 60 meters... so basically your getting to throw light an extra 15 meters or so...

Telling us data over just posting a photograph is really what everybody is looking for. It's hard for a lot of people to just look at your photo and understand what is going on. Telling us the data/specs on the product is what everybody kind of wants. Lumen/Lux/Power(amps)/etc... I think I read something on the site about 24V but what's the input voltage/amperage rating. What kind of bulbs are being used/etc...

Diode Dynamics

iTrader: (1)

If you're interested in "throw," I would recommend focusing on the 1 lux line- that is the amount of light you generally need to see objects at night. As shown by our measurements, the factory bulbs shine 1 lux at about 105 meters. The SL1 LED shines 1 lux at around 145 meters. That is 40 meters of additional distance, or about 130 feet. That will provide an extra 1.5 seconds of stopping time if you're travelling at 60 mph.

I appreciate the feedback, and we will continue to publish more information over the coming months. These bulbs are just over 1500 lumens at about 23 watts input power. But a lumen or wattage measurement does not tell you how your headlamps will perform on the road when they are installed. To know what the end result will be, we must look at the total performance of the system - bulb with headlamp. The lumens and watts of power have very little to do with the way the light shines onto the road. I'm happy to describe the data, but this is a basic isolux chart, and this is the standard way of describing beam patterns and light output on the road.

Diode Dynamics

iTrader: (1)

32 candlepower is virtually no light at all, that is the output of a sidemarker or something. I am honestly not sure what you're asking, the lux is shown in the graph for various distances. Thanks!

Vycor

I was asking about the "street legal" statement you guys made because only bulbs under 32 candlepower are street legal but I could not find any information about your bulbs at all. Are these legal to use for the road and in states that check the bulbs at inspection?

There is no data at all in anything on your site telling us about the bulbs other then a photo and some marketing info... how come there is no data being shared about power/lux/lumens/etc... is that 1500 lumen each or combined? So at 12VDC and aroudn 23w is that combined or each, because if it's each that means your little drivers are 1.9amps each power wise? Seems pretty high for a small bulb so i'm trying to figure out the math here but nothing is adding up

Against a wall say 25' - 50' how much lux is being thrown with the SL1. How much would a normal bulb put out at 25' / 50'

truckdriverguy

So, to answer the OP...

Vycor

LOL holy crap your right, how the hell did we all start talking about headlights

Vycor

Ohh I see how we started talking about headlights. Diode Dynamics started advertising about their headlight bulbs when you were looking for info on the taillights *rolls eyes*

truckdriverguy

Correct, except everybody got into all of the technical mumbo jumbo that doesn't really mean anything to everybody on here, and only one or two people have actually recommended something...