How many lumens?

[diff_lock2]

My only hand held flash light is an energizer arc white. It runs on 4 aa's in series, has a krypton incan light up front with a shitty reflector (very throwy) and a cold cathode tube (cct??) down the side of the body.

Now you know what I am working with.

To the point: I am running a 3.6v .75A rated bulb with 4 nimh aa cells. I haven't checked that acctual running v but lets say its close to 4v, how many lumens is this light pumping out?

The bulb is being pushed pretty hard, its nice and white, and at 4v and close to 1a lets say its 4w, just to keep it simple, whats the expected output in lumens?

At 10lm/watt its 40 lumen, and 20lm/watt its 80lm.

I read that at the limit an IRC bulb hits 60lm/watt, and someone won a free pizza, so could I expect more than 20lm/watt for my setup?

I want tp know this so I can visualize 200lm or 70lm from those led lights.

I have a 20w IRC light (at 12v, due to a huge v drop from the 2a draw on bad aa cells) and that should be at 500lm or more, right?

Thats it for now. I would love a hotwire mag but here mags aren't cheap, and ordering the lenses and reflectors isn't fun.

My next light might be a hand held mr16 12v light. but right now the funds don't exist.

I am typing on a thumb board, so expect errors.

 

[Gunner12]

For the first light, I'd presume 70-90 lumen out the front(presuming decent NiMh batteries, probably around 4.8v running if the batteries are decent). The LED lights also have a whiter tint so they would appear brighter for the same lumen.

The IRC one should be 500 lumen or more.

 

[mdocod]

A bulb driven that hard should deliver somewhere between 25 and 35 lumen per watt, depending on a lot of variables. After losses from reflector and lens, You can expect a solid 60-80 torch lumens.

 

[diff_lock2]

I was thinking of trying out a mag 3cell xenon bulb, but I didn't find any specs on it (the packing). I am googling it right now.

What do you guys think about spending 5 bucks on a maglite 3 cell xenon bulb?

 

[Gunner12]

The bulb runs at around 4.5v with fresh batteries so there won't be much of an overdrive. It(the bulb) works just fine with 6v.

Your setup right now would be brighter then if you used the 3D bulb.

 

[lctorana]

Try a Philips HPR53 - with rechargeables.

 

[diff_lock2]

If I find one. Looks good, a little more power than what I have now.

Are there any axle(whats the word I am looking for?) bulbs, were the filament is vertical when the bulb's top is pointed above, and the return of the filament goes through the coil back down to the socket; that are rated at around 5w and run off 4 aa's (nimh)?