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I thought LED lights were efficient?
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wraper:

--- Quote from: themadhippy on April 06, 2022, 12:19:40 pm ---
--- Quote ---Most of what V-TAC sells is below average. Of what you linked, V-TAC is the worst
--- End quote ---
Have you actually installed any of there stuff? On a previous contract  we used a lot of there  stuff,the only minor issue was the ip rated down lights didnt come with instructions on the order of  2 silicon seals,however trial and error  got it sorted.Over 12 months on and no call backs or failures and were not talking 1 or 2 fittings here,im talking about large retail spaces.

--- End quote ---
I have a few V-TAC bulbs in my house. Purchased them only because because they were at sale for EUR 1 - 1.20 a piece for a 9-11W bulb. They are the least efficient of what I have and have a linear regulator inside them so I put there whey they are used only occasionally. V-TAC with at least 100 l/m is an unobtanium rarity (check their website). Even more expensive "Samsung LED" models have the same crap efficiency. They have a linear regulator and a very small number of LEDs inside for given power. Most of the half decent bulbs of such power have a switch-mode ballast inside them but not V-TAC.
Northy:
These were the V-TAC battens that I was thinking of getting:

https://cpc.farnell.com/v-tac/667-vt-8-40/grill-fitting-40w-led-120cm-6400k/dp/LA07398

Do you really think the Integral LED ones:
https://www.toolstation.com/integral-led-lightspan-ip20-ik08-batten/p16505
Or LAP ones:
https://www.screwfix.com/p/lap-oxbo-single-4ft-led-batten-18w-2100lm-220-240v/465pp#BVQAWidgetID

Are actually much better?

I have one of the 4ft V-TAC retrofit tubes in an existing fixture already in the garage and have had no issues with it so far.

G

wraper:

--- Quote from: Northy on April 06, 2022, 12:50:41 pm ---These were the V-TAC battens that I was thinking of getting:

https://cpc.farnell.com/v-tac/667-vt-8-40/grill-fitting-40w-led-120cm-6400k/dp/LA07398

--- End quote ---
This is surprisingly decent for V-TAC, 120 lm/w.

--- Quote ---Do you really think the Integral LED ones:
https://www.toolstation.com/integral-led-lightspan-ip20-ik08-batten/p16505
Or LAP ones:
https://www.screwfix.com/p/lap-oxbo-single-4ft-led-batten-18w-2100lm-220-240v/465pp#BVQAWidgetID

Are actually much better?
--- End quote ---
All of them have about the same efficiency, 116-120 lm/w
madires:
I have also some V-TAC LED bulbs and strips. No problems so far.
PushUp:
This topic is too big, to give a comprehensive reply...but what is always true: "don't trust any label or imprint"!   ^-^

Just a short note, from what I have experienced so far:


1. OSRAM (2700K / 8.5W / 68mA)

My experience:
- OSRAM does not last very long, but you can repair them easily
- the power factor is very bad: 0.59 PF






2. NEDIS (2700K / 11W / 70mA)

My experience:
- I am quite happy with this brand
- the power factor is not that bad: 0.89 PF






3. OSRAM filament Cool White (4000K / 11W / 52mA)

My experience:
- filament means = beyond repair (at least for me!)
- as it is "cool white" the power factor is very good: 0.95 PF (the best power factor for LEDs I have seen so far)
- in contrast to "cool daylight filament": 0.61 PF (6500K / 10W)
- and in contrast to "warm white filament": 0.59 PF (2700K / 11W)






...i will probably check some more led fluorescent lamps in the future...


Here my two G13 (120cm) LED fluorescent lamps as a comparison: a cheap one from "Müller Licht" with 0.54 PF and a more expensive one from Osram with 0.92 PF. When I am not mistaken the Osram was the same price as the complete LED fluorescent lamp from "Müller Licht" in an IP65 housing with 2 x G13, 120cm; of course not the best build quality, but you get what you pay for... ;-)


Müller Licht G13, 120cm (4000K / 18W / 151mA)
with the worst power factor for LEDs I have ever seen: 0.54 PF






...and here the whole lamp with 2 x G13, this time with a power factor of: 0.58 PF for both LED fluorescent lamps in the IP65 housing:






OSRAM LED SubstiTUBE STAR ST8S, 120cm (6500K / 16.4W / "no info" mA)
with the 2nd best power factor for LEDs I have seen so far: 0.92 PF






Cheers!  ;)
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