Teflon tape & Halogen lights
> From: steveb at bga_com (Steve Benz)
> Date: Wed, 8 May 1996 12:23:44 -0500
> Trouble is, the fittings on the regulator don't just screw right into
> the needle valve. Usually (I think), regulators come with an output
> adapter for welding equipment.
Your experience may vary depending on the regulator. Some I have seen
with non-removable small hose barbs (which can be hooked directly to the
needle valve with heavy vinyl tubing), some with hose barbs that can be
removed (leaving you with threaded 1/4" NPT that can be adapted).
Likewise, one of the needle valves I've used came with a T-barb, and
another came with 1/16" Swagelok. I had no problems finding adapters,
some of them even at plumbing supply shops.
> A word about connections: First, don't use "Teflon Tape" for CO2
Did your connection say why? I've used Teflon tape without trouble for
> From: John Lobingier <jlob at wpa_net>
> Date: Wed, 8 May 1996 19:24:40 GMT
> Subject: Halogen Torchier Lamp For Plants?
> I was talking to a person on the net and they told me that they use a
> halogen torchier lamp with adjustable brightness to light their tank. They
> dismantled the lamp they bought, and then hung like a pendant light. I
> thought it may be a very good idea. Is it? Is halogen a effective light
> for plants? It would be very bright! A possible cheap substitute for metal
Uh, no. Imagine, if you will, 300 watts of incandescent bulbs hanging
over your tank. OK, imagine it just a teeny bit (but not much) more
efficient. That's halogen. MH is 2-4 times as efficient as Halogen. T-8
flourescents are 4-5 times as efficient.
Another way of looking at it: Your 300 watt halogen pendant is producing
the equivalent light output of a double-tube T-8 setup (which will
cost you around $30-$35 for bulbs, ballast, and miscellaneous mounting
hardware, and will quickly save you that much back in electricity).
From a table (originally posted here, now in the Krib's lighting section):
conventional incandescent: 500PAR64, 6500 (initial) lumens, 500 watts,
halogen: 50PAR30 (GE Halogen IR), 1000 lumens, 50 watts,
fluorescent T12, GE Chroma 50, 1870 lumens, 40 watts,
46.75 lumens/watt (on a ballast that only draws 40 watts, heigh ho)
fluorescent T12, GE rare earth, 2960 lumens, 40 watts,
74 lumens/watt (but this depends on the ballast)
fluorescent T8, GE rare earth, electronic ballast (!), 2650 lumens, 27
fluorescent compact F40/30BX/IS, electronic ballast, 2840 lumens, 30
MH, E28 universal burning horizontally, 7100 lumens, 175 watts,
MH, E28 universal burning VBU, 8300 lumens, 175 watts,
MH, E28 horizontal [EP39 base], 11300 lumens, 175 watts,
MH, E37 VBU, 31000 lumens, 400 watts,
HPS, GE Deluxe Lucalox, 9135 lumens, 150 watts,
HPS, GE White Lucalox, 4160 lumens, 95 watts,
LPS, 19140 lumens, 135 watts,