I bought some LED's to replace my Halogen spots ...
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Although these are classed as ideal Halogen replacements ... I was very disappointed with light output ...
The rooms had standard 50W halogen bulbs ...which I think are ~600 Lumen
The LED are a very poor light output in comparison .... OK I could get higher ... but 4W LED are in region of £7.40 you go to 6W and they are double the price.
Just wanted to let others know the 'hype' that a 4W LED will replace a
50W halogen, may be true for electrical connectivity ... but only 50% of the light output.
As I have mentioned in the past, a 3 LED Cree 9W MR16 is a resonable replacement for a 50W halogen. The output (measured with a lux meter) is actually slightly higher than the 50W halogen it replaced.
which has a 36 deg beam angle, you're spreading less lumens (320 compared to 650) over something like 5 times the floor area or roughly one-tenth of the light per square foot.
In my study/box room I have a ceiling mounted halogen track
It's had five 50W halogens in it (on a dimmer) for years, I bought the ledhut daylight 4.5W wide-angle COB bulbs, was originally intending to use them with an LED specific dimmer, but that was too flickery for my eyes, so I've rewired it using a two-gang switch, so that bulbs 1,3&5 fire forwards onto the desk, and bulbs 2&4 reflect off the wall into the room in general, and are independently switchable
No problem with equivalent brightness, though I "wasted" 50p per bulb by going for the dimmable option, they do nearly blind you if you stand where one is aimed into your eyes.
Would blow away any cost savings as it would need a load of extra light fittings.
My point of the mail was that the 4W I bought are touted as replacement for 50W halogens .. and they simply are not ... 4W LED does not give same light output as 50W Halogen ... almost 50% less Adverts are misleading .... I am returning all my 4W bulbs, at least they have a no-quibble return policy.
The link John Rumm posted is one I will follow up on, if they are avail in 120 angle I'll try them.
Reading this, was your transformer suitable? I see on the page to which you linked that there is this statement: PLEASE REMEMBER: These 12v LED lights need to run off a Driver/Transformer. Your existing transformer may not be LED compatible. Please visit our transformer section if you require new transformers. with a link to:
Well, you might suffer a similar disappointment, as the information on that link contains almost no technical information. In particular, no beam angle is mentioned, and neither is the lumen output.
As it happens, this morning I replaced 4 x 35W MR16 halogens in the bathroom with exactly those LED models (warm white / non-dimmable version) - I actually find the replacements too bright (I appreciate they were replacing 35W halogens though. I'm surprised you find yours so bad. Someone else mentioned the need to change transformers; I don;t know if that might be a factor?
I already put the GU10 versions in the kitchen, where they did replace
50W halogens, and I find there's little in it there. They might be
*slightly* dimmer, but certainly adequate anyway.
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My oldest LEDHut ones have only been in since last May; haven't experienced any problems with any of them since fitting (not that I would expect to in that timescale!). I've got one other LED downlighter, in a shower cubicle; that one's a Toolstation 5.4W G10 and has been fine too, since fitting in Nov 2011. LEDhut reckon their bulbs should be good for 5 years of continuous use; in effect lasting indefinitely in many applications.
Don't know if you've read the "Important Information for LED Buyers" link on the LEDHut home page, but they claim that all LED bulbs are not alike and basically to watch out for cheapp crap - make of that what you will.
With respect to the lamps in the Amazon link, what does 'dichroic' mean in describing these bulbs as the meaning I find via google does not seem to re late; that is very basically dichroic is 2 colours.
the two "colours" it relates to for the halogen lamps is "visible" and "infrared", so the light shines forward and the heat is refracted(?) out the back.
So far, had one a couple of years... originally paid about £10 for it - but they are half that now.
Not got the box anymore so can't be sure. At least 35 degrees I would guess. (mine are 10' up, so its not much of a problem - but it does not appear any narrower than the halogens)
MR16s by their very nature are designed to be moderately directional. The 3 LED cree one I have is comparable to the halogens it shares a fitting with, but I doubt any of them are close to 120 degrees.
A dichroic halogen has a semi opaque reflector that allows a proportion of the red and infra red pass through it. Thus they project less heat forwards (and give an attractive pink colour splash out the back of the bulb)
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