How many perfectionists does it take to change a lightbulb?

[Adsibob]

Got rid of a somewhat sophisticated LED luminaire and replaced it with a light fitting that takes two E27 bulbs. The light is rated for a maximum wattage of 2 x 40W, which with modern LED tech should be plenty to replicate the 3000 lumens we had from the old LED luminaire. So I bought two of these bulbs:

https://www.screwfix.com/p/sylvania-toledo-platinum-e27-gls-led-light-bulb-1535lm-7-3w/959vn which at 1535 lumens each, should give us plenty of light.

 

Wired in the new ceiling lamp screwed the two E27 lights in, switch it on and it is a very dim yellow light indeed. This is 3m above a utility room and it the light is just not very utilitarian. I originally thought the reason the light was so pants was that the diffuser that comes with the light fitting is far too thick, it's slightly frosted and has a cheap and slightly aquamarine blue tinge to it. The light bulbs are 2700K, the same (I believe, as the luminaire we had before - though maybe it was 3000K). But when I removed the diffuser and ran the light without it, it really wasn't that much better, just a little brighter, but really not much. Are the Sylvania lightbulbs I've purchased from Screwfix really that crap?

Looking for brighter lightbulbs that does not exceed the 40W rating per bulb, the only thing reasonably priced I've found is this: https://www.bltdirect.com/high-quality-gls-e27-bulb-2000lm-brightness-14-5w-power-4000k-cool-white-non-dimmable-200-degree-beam-angle-frosted-finish I wouldn't normally never buy a 4000K coloured lightbulb for the home, but this is in a utility room and maybe a bluer light is not a bad thing. Not sure.

Any suggestions for which lightbulbs to get to significantly boost the light in this utility room? Don't understand why 3070 lumens from two LED light bulbs is not producing anywhere near as much light as the 3000 lumen LED luminaire we had before???

[-rick-]

Is it possible the fitting has the two bulb sockets wired in series? ie, it used 2 bulbs rated at 40W but ran them much below that? An LED bulb running at half it's rated voltage will be extremely dim.

[Adsibob]

2 hours ago, -rick- said:

Is it possible the fitting has the two bulb sockets wired in series? ie, it used 2 bulbs rated at 40W but ran them much below that? An LED bulb running at half it's rated voltage will be extremely dim.

Good point. How do I work that out? I guess if it’s running in series, unscrewing one will cause the other to switch off. Have I remembered my GCSE physics correctly?

[Mattg4321]

A load of those lumens from the GLS bulb will be going in directions that are not useful to you. 
 

The led fitting you had before probably had the full 3000 pointed in the right direction 

[Mattg4321]

1 minute ago, Adsibob said:

Good point. How do I work that out? I guess if it’s running in series, unscrewing one will cause the other to switch off. Have I remembered my GCSE physics correctly?

It won’t be this, don’t think I’ve ever seen a light fitting with lamp holders wired in series. As you say, take one out and the rest don’t work. 

[Adsibob]

2 hours ago, Mattg4321 said:

A load of those lumens from the GLS bulb will be going in directions that are not useful to you. 
 

The led fitting you had before probably had the full 3000 pointed in the right direction 

This is a very clever, though now I think about it, very obvious advantage of luminaires. I got pissed off with the last luminaire because it was bloody expensive and when a part inside it failed, even though it was a Siteco branded part with a clear part number, Siteco wouldn't sell me one individually. So thought lightbulbs were better. But now I'm regretting the lightbulbs.

[Ferdinand]

Can you get a LED type of broad spot bulb (would it be called a flood?) if it is 3m high that would work?

Or with LEDs can we be slightly more relaxed about the rating, since they run cool or cold?

Years ago I sometimes used bulbs that were half-silvered behind.

I have also sometimes used ones that I call "cluster spots" from Screwfix with 2, 3 or 4 fittings, like this (for one example), which are inexpensive. But this may be a return to your previous setup.
https://www.screwfix.com/c/electrical-lighting/spotlights/cat840842

Plan X could be a mirror on the ceiling !

[SteamyTea]

The trouble with lighting is the horrible combination of units used.

 

Luminance 

Luminance Flux

Luminance Energy

Luminance intensity

Luminance Efficacy 

 

Candela

Candela/m²

 

Lumen

Lumen/m².steridan

 

Lambert

Nit

Skot

Stilb

Apostilb

Bril

Blondel

 

It's a (expletive deleted)ing minefield and after having done a contract for one of the biggest manufacturers of controllers and diffusers, I was non the wiser, except that every 'lighting designer' I met, knew less than me, and my contract was nothing to do with the lighting side of the business.

 

Get a bulb and hang it from a wire dangling from the ceiling.