Enenieer spot light

[jawnn]

Is it possible to engineer a spot light?

I want to replace a 75-watt quarts halogen AC spot light with LED's… is it possible to come close to 1300 lumens?

Where is the best place to get LED towers? I got some from superbrightleds.com but they didn't have enough information to calculate any thing. Then I saw some place that has a 27 Q5? L.E.D. tower wedge base "bulb".

Maybe I have to wait a couple years? Is the next jump in luminosity going to be as large as last years?

How many Q5's (or equivelent) would it take to replace a 55watt 12v dc quarts bulb?

 

[spencer]

More info is needed. How big of an area do we have to work with? Deepness and diameter. To get 1300 lumen, 6 Cree's will be more than enough.

 

[AlexGT]

I would wait for the appearance of the Phatlight leds from luminous, they look promising with up to 4000+ lumens. but will need a big heatsink

HTH
AlexGT

 

[jawnn]

spot light

I don't know where they messure the spot lights , but my work table is only a foot or so away. 22x 14 ish.

 

[jawnn]

tower bulbs

if your talking about these they are way too much money. http://www.luminousledlighting.com/coandouwhled.html

I want to know how well these things would work? WLED WHP13-T on this page:
http://www.superbrightleds.com/specs/bulb_specsHP360.htm

or one of these? although they may have a larger wedge base...
http://www.shopwiki.com/Tower+LED+Bulb+-+3157+Amber

http://www.acesuppliers.com/Supplie...erFlux-Tower-Bulb_Product_Showroom_53424.html

http://cens.com/cens/html/en/product/product_main_59366.html


Then I thought it may need a good reflector? but no idea where to find that kind of thing. Or if it has an edison base, I could use my swing-arm lamp?

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what is CRI rating?

will there be much brighter LEDs next fall?

if I use a 7.2 AH lag battery for a halogen bulb that uses 55 watts would I get only have the light at at half the volts?

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[jawnn]

Re: tower bulbs

It seems to be difficult to get info on this forum

 

[John_Galt]

No, not neccessarily difficult, you just have to explain what you mean.

Are you saying that you have a work bench that is 22 inches wide, and 14 inches deep, and you want to replace a halogen work light with LED's? I'm going to assume, that when you say "my work bench is only a foot or so away" that means that your work light is a foot (~) above your work space. 1300 lumens seems like too much light for such a small area.
It seems like you would get a lot of back scatter which would make it hard to see. But for a work light that close, I'd think you would need a flood light, not a spot-light. 1300 lumens is acheivable with 2 P7's/MCE's, underdriven, with some small reflectors, to get a floodier light.

CRI = Color Rendering Index. In other words, the higher the CRI rating (I think most CREE's are in the 80ish range) the more accurately they will show color, when compared to sunlight.

XP-G's won't be coming out for a while, and XP-G quad LED's probably won't appear for a long time after that. Think years(s) not months.

 

[divine]

A lot of spotlights are made in a plastic housing. It would be very difficult to keep a high output LED cool in a plastic spotlight.