Problem with Light Bulbs

[Hercules1946]

Hello
I recently bought a lamp telling me to fit an E27 maximum 40 watt bulb, but I'm very confused by all the details given on bulbs for sale. In Wickes, I found an E27 bulb marked 42w > 55w 625 lumen. They didn't have one that was just 40 watts. What does all this mean, and is the bulb ok for my lamp ?
Any help would be appreciated.
Thank you.

 

[snowhead]

I see that Tesco have dumbed down their product info to the point that the actual power consumption is not mentioned anywhere on the page. You would have thought that 'Product Specifications' > 'Power' > 'Power' would have been a convenient place for this detail.

It's nice to know it weighs 195 grams tho.
Saves the worry of having to hire a Genie lift to get it up to the ceiling..

 

[Hercules1946]

Buy Pack of 3 Osram LED Light Bulbs 40W Screw E27 Traditional from our All Light Bulbs range - Tesco

Thanks Marvo - Ill check out Tescos next time Im in there. )

 

[Hercules1946]

What they are trying to put across is that it is a 42W lamp which gives the equivalent output to a standard 55W lamp.

This is what I thought, but its very difficult to get a definitive answer to the question. What matters is will the bulb get too hot for the fitting, and so the question should be:
Using this bulb, what level of current will flow in a 240volt circuit, i.e. 0.175 amp or 0.229 amp ?

 

[Hercules1946]

If the fitting is rated for a 40W lamp, in principle a 42W lamp is too powerful (and it's the 42W that counts, being the actual power dissipated, rather than the 55 which is the power of a hypothetical non-halogen GLS lamp it could replace). But only 2W too much - not a big deal unless the fitting is at its maximum ambient temp. Plus - the halogen gives out more of its 42W as light compared to the GLS, so the heat input to the fitting is probably less anyway.

But, nit-picking aside, LED is a good idea.

This is the best response, giving me all the information I need so thanks for that, and thanks to all the others who have replied.