On 02/03/2013 12:32, Andrew Gabriel wrote:
In article ,
Stephen H writes:
Must not be CFL... crap in the cold
Must not be Halogen... too power hungry

That leaves me with LEDs provided

Do you need instant-on at near-full output?

it does not cost an arm and a leg
Gives similar light levels to a 500 watt halogen
Has good colour rendering close to that of a halogen

Why is that important outside? Are you broadcasting colour TV images?


basically they are to be controlled via PIRs for a deterrent against
night time intruders and for being outside in the garden to get logs in
etc on all four sides of the house.

Also I have a CCTV system that is colour during the day and B&W during
the night. It only records when it detects motion or a change of image
picture.

So having a light come on will serve two purposes, as a deterrent and to
assist with the CCTV recording as it will definitely sense the change of
picture and record in colour instead of B&W

Must not be CFL... crap in the cold
Must not be Halogen... too power hungry

That leaves me with LEDs provided

it does not cost an arm and a leg
Gives similar light levels to a 500 watt halogen
Has good colour rendering close to that of a halogen

I have accounts with Denman, Lyco, Screwfix, TLC direct and toolstation....

Recommend me a make and model of a floodlight that fulfils the above
criteria.....

Thanks,

Stephen

On Fri, 01 Mar 2013 18:37:38 +0000, Stephen H
wrote:

That leaves me with LEDs provided

it does not cost an arm and a leg
Gives similar light levels to a 500 watt halogen
Has good colour rendering close to that of a halogen

Rough calc suggests that a 100W LED will knock out around 7000lumens,
around half what I think a 500W halogen does. 150W LEDs are available,
but still around 80usd and that's cheap from China, diy styleee.
Advantage is, a 100W LED is cheap as chips now, but you'd need two of
them, plus drivers. Even diying it, it would still cost ~80usd plus
the housings and reflectors. If it were me, I'd look at getting a
couple of the lower powered ones with an eye to simply equipping them
with the higher powered blocks (paying attention to heatsinking, of
course).

Have a look on ebay for 100W LED dies and drivers.

On Fri, 01 Mar 2013 18:37:38 +0000, Stephen H
wrote:

Must not be CFL... crap in the cold
Must not be Halogen... too power hungry

That leaves me with LEDs

Why? If you assume halogen are too power hungry that implies the
lamps will be running for some time in which case low pressure mercury
(if you don't mind the colour) is the clear leader but high pressure
mercury or metal halide, depending upon you preference for colour
quality, should also be contenders.

If the light will only be on for short times halogen still beat LED
quite comfortably in any cost benefit assessment for similar light
levels.

On Mar 1, 6:37*pm, Stephen H wrote:
Must not be CFL... crap in the cold
Must not be Halogen... too power hungry

That leaves me with LEDs provided

* * * * it does not cost an arm and a leg
* * * * Gives similar light levels to a 500 watt halogen
* * * * Has good colour rendering close to that of a halogen

I have accounts with Denman, Lyco, Screwfix, TLC direct and toolstation.....

Recommend me a make and model of a floodlight that fulfils the above
criteria.....

Thanks,

Stephen

SON?
http://en.wikipedia.org/wiki/High_pr...22White.22_SON

On 01/03/2013 23:33, Grimly Curmudgeon wrote:

Rough calc suggests that a 100W LED will knock out around 7000lumens,
around half what I think a 500W halogen does.

Unless attempting to illuminate a football ground the average
householder would not need a 500W halogen, even a 150W halogen would
probably be too much.

A cheap 20W (£20) LED flood from Ebay may be worth a punt to see if it
meets the needs. A cool white rather than a warm white for a flood
light seems to give a better illumination.

With the cheap Chinese floodlights the LED is mounted to a large
heatsink (the metal body of the light) and therefore will not suffer so
much from overheating as can be seen on many replacement LED 'bulbs'


--
mailto:news{at}admac(dot}myzen{dot}co{dot}uk

In article ,
Stephen H wrote:
That leaves me with LEDs provided

it does not cost an arm and a leg
Gives similar light levels to a 500 watt halogen
Has good colour rendering close to that of a halogen

No harm in dreaming. ;-)

--
*I love cats...they taste just like chicken.

Dave Plowman London SW
To e-mail, change noise into sound.

On Sat, 02 Mar 2013 10:42:21 +0000, alan
wrote:

Unless attempting to illuminate a football ground the average
householder would not need a 500W halogen, even a 150W halogen would
probably be too much.

True dat; for most domestic situations. I assume the OP has a clear
idea what he really needs to light up.

A cheap 20W (£20) LED flood from Ebay may be worth a punt to see if it
meets the needs. A cool white rather than a warm white for a flood
light seems to give a better illumination.

Definitely worth a try for smaller areas.

In article ,
Stephen H writes:
Must not be CFL... crap in the cold
Must not be Halogen... too power hungry

That leaves me with LEDs provided

Do you need instant-on at near-full output?

it does not cost an arm and a leg
Gives similar light levels to a 500 watt halogen
Has good colour rendering close to that of a halogen

Why is that important outside? Are you broadcasting colour TV images?

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

In article ,
Stephen H writes:
On 02/03/2013 12:32, Andrew Gabriel wrote:
In article ,
Stephen H writes:
Must not be CFL... crap in the cold
Must not be Halogen... too power hungry

That leaves me with LEDs provided

Do you need instant-on at near-full output?

it does not cost an arm and a leg
Gives similar light levels to a 500 watt halogen
Has good colour rendering close to that of a halogen

Why is that important outside? Are you broadcasting colour TV images?


basically they are to be controlled via PIRs for a deterrent against
night time intruders and for being outside in the garden to get logs in
etc on all four sides of the house.

Also I have a CCTV system that is colour during the day and B&W during
the night. It only records when it detects motion or a change of image
picture.

So having a light come on will serve two purposes, as a deterrent and to
assist with the CCTV recording as it will definitely sense the change of
picture and record in colour instead of B&W

LED isn't there yet in the price/performance area for this size.
I would buy the cheapest halogens you can find (no more than
£5/fitting), with a view to replacing them when LED price/performance
becomes competitive, probably in a couple of years time.
If you buy equivalent power LEDs today, you will not recover the
price premium you paid by not waiting for them to become cheaper.

Stick to 100W max, and use more fittings where that's not enough,
not higher power ones. Mount them high up on the building and
angled to cut-off the light no further than your property
boundary. If you want to spill light outside your property, get
permission of that property owner. The filaments must not be
visible to road users as they will cause dazzle.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]