How much light is produced by a 90W halogen flood bulb?

[shortylickens]

Our gun range is looking to save money. 5 lanes with 3 lights each.
They are running 90 watt halogen flood lights in a standard 120v socket. Was thinking I could replace with either CFL or LED's. I wanna get as much light if not slightly more.

I THINK the halogens are producing 45 watts of light and 45 watts of heat. If true the 14 watt LED I have now wont be a good replacement, and will need something higher powered thats not any larger.
http://www.amazon.com/gp/product/B002OKO7A8/
Got it for my moms kitchen but she doesnt like the cold lighting. Kept it cuz it cost so damn much.

OR, we could use CFL's and save a few bucks on bulbs but not get the same electricity savings. I already have several of those sitting around the house. Kept them from my last apartment.

So, how much of a halogen is light, and how much is heat?

 

[Venom20]

A typical 90W halogen bulb will produce ~1270 lumens.

Lumens are what matter to lightning, watts are a more money thing. As long as you keep the amount of lumens the same or higher, you should be ok.

You'll need to be slightly more aware of geometry though, I've found that halogens produce a softer more diffuse light, while LED's are slightly harder and more directional. But I would imagine this depends on the bulb.

 

[shortylickens]

HOLY CRAP THATS A BUTTLOAD OF LIGHT!



Oh well, I already have a bunch of CFL's anyway.

Thanks a lot newb! Happy New Year!!

 

[Mark R]

That lamp looks like a reasonable replacement.

Just to reiterate what Venom said: lumens are what actual visible light output is measured in. Broadly speaking, halogens produce about 13-14 lumens per Watt of electrical energy

(As an aside, this is equivalent to about 3 W of light energy and 97 W of heat energy for a 100 W halogen).

That LED lamp outputs about 1000 lumens of light, which is a similar, albeit marginally lower total output.

(Another aside, LEDs get around 70 lumens/Watt. CFLs get about 60-70 lumens/Watt. Modern electronic "high efficiency" strip fluorescents get about 100 lumens/Watt)

Note that you also need to take into account beam shape (or radiation pattern, to use the correct technical term). The LED lamp that you linked has a beam width of 30 degrees - which is a "narrow flood" pattern - more diffuse than a spot-light , but still producing a directional beam. There are other beam patterns available, if you look for them (and your light may have a different pattern to the one you linked to, unless it is the exact same one). Similarly, halogens are available in numerous different beam widths - from 10 degree spotlights, through to 50 degree floods.

A bulb with the same number of lumens, but a wider beam, will produce a less intense beam, as the light will be spread over a larger area. Most CFLs do not produce a directional beam, so their light is spread over a full 360 degrees, as a result, they give a much lower light intensity (even though they may produce the same quantity of light).

 

[PlasmaBomb]

HOLY CRAP THATS A BUTTLOAD OF LIGHT!



Oh well, I already have a bunch of CFL's anyway.

Thanks a lot newb! Happy New Year!!

I'm pretty sure the 20W CFL that i bought the other week was ratred about 1250 lumens... but see marks comments.

 

[shortylickens]

OK, this past week I went out to the range, with all my bulbs. There is no CFL currently made that can replace the focused light of the halogens already installed out there.
The LED bulb I had was right on the targets but not bright enough. Home Depot had an LED bulb that was twice as powerful, but its insanely expensive and I doubt the club would wanna purchase 15 of them, even though they'd save a ton of electricity over the year. Oh, and the light was kinda cold but frankly on a gun range I think people can deal with it. Especially cuz we aint rich and saving electricity would be a very popular idea.
Maybe one year from now when LED bulbs are cheaper and perhaps better quality the club will let me revisit the issue.