ElektroLumens
Flashlight Enthusiast
I thought I might start a thread to post some initial testing I've done with the 5 watt Luxeon Star. Perhaps others can also post some of their similar testing and observations here.
I mounted a 5 watt cyan Luxeon Star in a 3 'D' cell flashlight. I epoxied the emitter using a mix of 2 part epoxy and silicon grease, and wired it up, and epoxied the stock collimator and holder on the heat sink.
I modified a 6 AA battery holder to fit inside the 3 'D' cell battery compartment. It just slides right in.
With the stock optics, the beam is not a tight focused beam, but a wider beam angle, possibly 15% to 20%. With fairly new batteries, I measured 1320 lux. This is a lot brighter than that number sounds, as it is a fairly wide angle beam.
I started a test today, turning on the flashlight about 2:24pm, and leaving it on. Here are some brightness measurements.
2:24 - 1,000lux
2:39 - 1,000 lux
2:46 - 1,000 lux
3:16 - 930 lux
5:03 - 610 lux
6:45 - 570 lux
7:30 - 530 lux
I wanted to do other tests, and removed the batteries. The light is still very bright, for a Luxeon Star flashlight. But not the mind boggling brightness of the fresh batteries.
I want to see how it does with 4 cells, at 6 volts. So I now put 4 'C' cells into the 3 'D' cell flashlight, using a piece of 1" plastic pipe for a spacer, and modify the tail cap by grinding out the anodizing in the end, and put in a smaller spring.
These are fairly used, but not depleted C cells. I have some fresh batteries I will use later to do a run test.
I want to see how the brightness lasts. You know how a Luxeon Star will go on and on for days. I'm wondering if it will go on and on at a particular brightness.
So the initical brightness is at 750 lux. I'll leave it on for a while and see how the light brightness does. This is starting off well below the rated current and voltage ratings. Later on, I will do some voltage and current long term testing, but I'll have to do it with a 5 watt LS on a external heat sink.
So here it now gets turned on at 8:45pm, Wednesday evening.
8:45pm - 750 lux
To be continued . . .
Wayne J.
www.elektrolumens.com
I mounted a 5 watt cyan Luxeon Star in a 3 'D' cell flashlight. I epoxied the emitter using a mix of 2 part epoxy and silicon grease, and wired it up, and epoxied the stock collimator and holder on the heat sink.
I modified a 6 AA battery holder to fit inside the 3 'D' cell battery compartment. It just slides right in.
With the stock optics, the beam is not a tight focused beam, but a wider beam angle, possibly 15% to 20%. With fairly new batteries, I measured 1320 lux. This is a lot brighter than that number sounds, as it is a fairly wide angle beam.
I started a test today, turning on the flashlight about 2:24pm, and leaving it on. Here are some brightness measurements.
2:24 - 1,000lux
2:39 - 1,000 lux
2:46 - 1,000 lux
3:16 - 930 lux
5:03 - 610 lux
6:45 - 570 lux
7:30 - 530 lux
I wanted to do other tests, and removed the batteries. The light is still very bright, for a Luxeon Star flashlight. But not the mind boggling brightness of the fresh batteries.
I want to see how it does with 4 cells, at 6 volts. So I now put 4 'C' cells into the 3 'D' cell flashlight, using a piece of 1" plastic pipe for a spacer, and modify the tail cap by grinding out the anodizing in the end, and put in a smaller spring.
These are fairly used, but not depleted C cells. I have some fresh batteries I will use later to do a run test.
I want to see how the brightness lasts. You know how a Luxeon Star will go on and on for days. I'm wondering if it will go on and on at a particular brightness.
So the initical brightness is at 750 lux. I'll leave it on for a while and see how the light brightness does. This is starting off well below the rated current and voltage ratings. Later on, I will do some voltage and current long term testing, but I'll have to do it with a 5 watt LS on a external heat sink.
So here it now gets turned on at 8:45pm, Wednesday evening.
8:45pm - 750 lux
To be continued . . .
Wayne J.
www.elektrolumens.com