These 16w and 28w lamps come in either 2 pin or 4 pin - I wondered why?
Seems daft having 2 configurations for 1 lamp.

Will a 2 pin lamp work in a 4 pin holder?


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

The Medway Handyman was thinking very hard :
These 16w and 28w lamps come in either 2 pin or 4 pin - I wondered why? Seems
daft having 2 configurations for 1 lamp.

I think - not sure on this....

The 2 pins have (most of the control gear inside them, where as the 4
pin jobs all of the control is outside.


Will a 2 pin lamp work in a 4 pin holder?

No!

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

"The Medway Handyman" wrote in message
m...
These 16w and 28w lamps come in either 2 pin or 4 pin - I wondered why?
Seems daft having 2 configurations for 1 lamp.

Will a 2 pin lamp work in a 4 pin holder?


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk





I'm not quite sure which ones you are referring to, but, if the following 2
and 4 pin:

http://www.tlc-direct.co.uk/Products/LADD18.html

http://www.tlc-direct.co.uk/Products/LADD18slash4P.html

you will find that they are not interchangeable as the base has different
lugs on it. The 4 pin ones I use are for lights that have an emergency
battery supply. Although they appear identical apart from a small red LED
and that doesn't stop people forcing the wrong one in though!

Peter

Harry Bloomfield wrote:
The Medway Handyman was thinking very hard :
These 16w and 28w lamps come in either 2 pin or 4 pin - I wondered
why? Seems daft having 2 configurations for 1 lamp.

I think - not sure on this....

The 2 pins have (most of the control gear inside them, where as the 4
pin jobs all of the control is outside.


Hmmm. 2 pin & 4 pin lamps are the same price at TLC. I would have thought
if 2 pin had more inside they would cost more?


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

Peter Andrews wrote:
"The Medway Handyman" wrote in
message m...
These 16w and 28w lamps come in either 2 pin or 4 pin - I wondered
why? Seems daft having 2 configurations for 1 lamp.

Will a 2 pin lamp work in a 4 pin holder?


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk





I'm not quite sure which ones you are referring to, but, if the
following 2 and 4 pin:

http://www.tlc-direct.co.uk/Products/LADD18.html

http://www.tlc-direct.co.uk/Products/LADD18slash4P.html

you will find that they are not interchangeable as the base has
different lugs on it. The 4 pin ones I use are for lights that have
an emergency battery supply. Although they appear identical apart
from a small red LED and that doesn't stop people forcing the wrong
one in though!

I meant these (at the top) http://tinyurl.com/yz6lz32


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

In article ,
"The Medway Handyman" writes:
These 16w and 28w lamps come in either 2 pin or 4 pin - I wondered why?
Seems daft having 2 configurations for 1 lamp.

Will a 2 pin lamp work in a 4 pin holder?

No.

The 2-pin ones have a built-in fluorescent tube starter in the base,
and will only run using a series magnetic ballast. They aren't
dimmable.

The 4-pin ones are usually used with electronic control gear and so
have no fluorescent tube starter in the base, and dimmable electronic
control gear is available. They can in theory be used with a series
magnetic ballast and separate fluorescent tube starter, but that
would be most unusual and I've never seen it done.

Note that both the 16W and 28W have another power rating
which is the same physical size - 21W and 38W respectively.
(Actually, the higher power ones have larger diameter tubes,
but the overal lamp size is the same.)

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

Andrew Gabriel wrote:
In article ,
"The Medway Handyman" writes:
These 16w and 28w lamps come in either 2 pin or 4 pin - I wondered
why? Seems daft having 2 configurations for 1 lamp.

Will a 2 pin lamp work in a 4 pin holder?

No.

The 2-pin ones have a built-in fluorescent tube starter in the base,
and will only run using a series magnetic ballast. They aren't
dimmable.

The 4-pin ones are usually used with electronic control gear and so
have no fluorescent tube starter in the base, and dimmable electronic
control gear is available. They can in theory be used with a series
magnetic ballast and separate fluorescent tube starter, but that
would be most unusual and I've never seen it done.

Note that both the 16W and 28W have another power rating
which is the same physical size - 21W and 38W respectively.
(Actually, the higher power ones have larger diameter tubes,
but the overal lamp size is the same.)

Thanks Andrew.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

John Rumm wrote:
Andrew Gabriel wrote:

The 4-pin ones are usually used with electronic control gear and so
have no fluorescent tube starter in the base, and dimmable electronic
control gear is available. They can in theory be used with a series
magnetic ballast and separate fluorescent tube starter, but that
would be most unusual and I've never seen it done.

I have a couple of portable work lights that use these - mag ballast and
separate starter...

My bathroom light has a 4 pin, mag ballast and an electronic starter.
The electronic starter made the flicker at turn on a little better.