Looking For The "Floodiest" Bulb

[TKO]

I am looking into putting together another work (patrol) light, so I am trying to stay in the 4-6 amp draw range to maximize runtime.

I have narrowed my bulb list down to the following:

5761
64610
64440
64447

All have the low amp draw that I am looking for and put out sufficient light (especially the 440 and 447), but I have no idea what kind of beam three of these bulbs generate.

I want FLOOD.

I have read that the 5761 is floody, but can't find any information concerning the beam pattern of the other three.

Does anyone have any experience with the listed Osram bulbs regarding their beam characteristics compared to the 5761?

 

[lebox97]

AFAIK flood is determined by the type of reflector (deep narrow vs wide shallow), type of reflector surface (smooth vs stippled etc), position of bulb height within reflector, the type of lens, frosting of the bulb - or all the above. :shrug:

I have frosted 5761 bulbs before (using etching cream), and used a frosted lens before - either works well for me. you can also use a diffusing film over the lens for a less permanent solution that works well too.

 

[TKO]

I was wondering if (given same reflector) certain filament qualities/characteristics would affect beam pattern.

Like say an axial filament would give a more artifact free beam as opposed to a transverse filament.

 

[jugg2]

If you want pure flood you should probably check out a heavy stipple reflector. That would be a very smooth, all flood beam.

 

[Paul_in_Maryland]

WolfEyes M300.

 

[Trashman]

The reflector is, in fact,the most important factor in creating flood. A medium or heavy orange peel or stipple reflector will provide plenty of flood. A light diffusing lens will also give tons of flood. The question to answer is, how far do you want to throw the flood? Different bulbs do have different beam width characteristics, but focusing on the reflector (or lens, if the LDF route is good for you) is what you really want to do. With a transverse filament, a longer filament should give a slightly wider beam.

 

[LuxLuthor]

As has been mentioned, the biggest factor for a flood beam pattern is a heavier textured reflector. Next most important factor is position of bulb in the reflector. Then transverse filament, and axial filament giving tighter pattern.

When you compare 6V vs. 12V with similar 5-6A draw rates, but want longer run time...you are way better trying to get a 6V in a 2p battery configuration, rather than 12v in 1P. For example, you could do a 2s3p with 17670 or Pila 600s in a 2D mag. When you compare total lumens of the various bulbs you listed, there will be a wide variation in hotspot and flood just from total lumens put out.