If anybody is interested Sainsbury's are selling off their stock of own-brand R7s linear halogen bulbs. Both 78mm (120W) and 118mm (400W) were on sale for 20p each in our local branch this morning.
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5 years ago
Linear halogen bulbs
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5 years ago
unfortunately they have negative value.
NT
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5 years ago
Yes - if ever there was a fitting best replaced with LED, it is an outside flood light. Those linear halogens seem to have a poor life - even more so if unbranded types.
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5 years ago
However, widely used in theatrical stage floodlights. The killer was excess heat.
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5 years ago
I think it depends on how much use they get. We have a couple of PIRs using 78mm bulbs and both have had the bulb replaced only once in 6 years. And as for replacing with leds, the light output from a led is considerably lower in lumen value to a halogen. Are there any 78mm leds which provide even 1000 lumen? The linear halogen is 2200. And, I guess, it depends also on how easy they are to replace; for an awkward position I think a led would win every time,
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5 years ago
There are plenty of LED array floodlights whixch give a high output. See CPC: EG
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and there are more powerfull ones, too.
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5 years ago
Ah! The dazzle the people across the road lights that people cannot get the hang of aiming correctly.
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5 years ago
So what if you underrun one of those, would it last longer? Brian
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5 years ago
Who remembers the filament strip lights used in display cabinets to make things sparkle? I have four of these and the way I keep them from blowing is to wire them in series, they last for years like that. Obviously not for me but when visitors come its nice to have a talking point. Brian
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5 years ago
That's fine, but it isn't a 78 mm equivalent led, more similar to a
118mm size (which would be 400w) and provide over 8500 lumens.- Vote on answer
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5 years ago
Indeed - a bird's nest appeared on the halogen one I put out the front, so it couldn't be used because of the fire risk. We now have a couple of LED floodlights that work better anyway - they seem to give a more even illumination with less dazzle, even though they're mounted lower than the old one.