I've just started experimenting with a low-energy bulb. It's the sort
with 3 U-shaped prongs and is rated as 20W in 100W out (sort of)



Put it in the bin! Logic says you don't get anything for nowt. It is the old
fashioned 1.25" daylight tubes that you want. Cannabis growers swear by them!!



------------------------------------------
The Hemyock, Devon, UK branch of The Residents Appreciation Society.

http://english.aljazeera.net

In article ,
(Dcjtee) writes:
| I've just started experimenting with a low-energy bulb. It's the sort
| with 3 U-shaped prongs and is rated as 20W in 100W out (sort of)
|
| Put it in the bin! Logic says you don't get anything for nowt. It is the old
| fashioned 1.25" daylight tubes that you want. Cannabis growers swear by them!!

No, don't! Use it where you want to replace a 100 watt incandescent.

Logic is right, but that is because a 5' fluorescent tube is 65 watts,
not 20, and is equivalent to 4 100 watt incandescent bulbs. I don't
know of any reason that the thick tubes are better than the thin ones,
though.


Regards,
Nick Maclaren.

I don't
know of any reason that the thick tubes are better than the thin ones,
though.

Our old mate "Logic" again. The thick ones have more surface area.
The thin ones DO get slightly warmer indicating wasted energy.

I've also tried comparing light from a 20W energy saver lamp and a 20W
flo' striplight using my cameras light meter and the strip wins hands down.

Surprisingly a daylight tube is better than Gro-Lux for plants.

That's my experience anyway.

Dave


------------------------------------------
The Hemyock, Devon, UK branch of The Residents Appreciation Society.

http://english.aljazeera.net

On Mon, 29 Mar 2004 00:06:03 +0100, Titch wrote:

....
Found some info on the tube C&P below, Thanks
Repti Glo Desert UV Tube 8.0 - 15W 18" / 45cm
A purpose made reptile Ultraviolet light, ideal for lighting terrariums
and
vivariums for reptiles and plants from desert areas, supplies 33% UVA
and 8%
UVB. Promotes essential Vitamin D3 synthesis, required by many reptiles
to...


You might actually sunburn the seedlings.
No, I'm serious.

--
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/

In article ,
(Nick Maclaren) wrote:

Logic is right, but that is because a 5' fluorescent tube is 65 watts,
not 20, and is equivalent to 4 100 watt incandescent bulbs

Wait a minute! I don't have room for a 5' tube. I've got a plant area
about 18" long by 12" wide and I'm pumping 20W of power into it which
gives roughly the same intensity of light as I'd get with a 6' tube and
80W

I also have some foil to reflect light that tries to escape.

And those marigold seedlings are reacting like they know it's there :-)

My only slight worry is that the wavelengths may be all wrong and I
shall get no photosynthesis and loads of tanned marigolds :-)

Steve Harris - Cheltenham - Real address steve AT netservs DOT com
A useful bit of gardening software at http://www.netservs.com/garden/