Your point is, er, was almost taken.
Mine was not. Just a moments owie.:thumbsup: See?
But it did take a divot out of the nail.
(You have to look real close)

Dropped everything and installed the fan guard.

[attachment=o216516]

Going kinda ballstothewall with this array design.

Got no current limit, so temperature control is mandatory.
Did not like the dimmers, too easy to "bump the potentiometer up, even with the knob removed.
Had marked a max. position and thought about replacing the potentiometer with a pair of resistors. But also noticed how hot the un-heatsinked, triac inside was getting.
Sealed in a heavy plastic box with no ventilation.:wtf:
(<Sigh> Guess that's why it was dirt cheap on e-bay.)

Quit trying to double-duty the fan and decided to remote the supply and give it it's own fan.
Then remembered a trick from the '50s
When us po' kids needed a sub 1 ohm, high wattage resistor.
We rolled our own out of nichrome wire.
Had a chart of resistance per foot of different gauge wire.

So, I'm thinkin' I need to drop my Vin. to the dimmers so the MAX out is 10.8 Vdc. Then, I can turn it down to change the B:R , have minimum heat dissipation in the dimmers and a, "do no harm", upper limit.

So I figure I've got 12 amps to work with. Should be easy to calculate, for some folks.

But, no worry, true to my redneck roots, I just grabbed 6 feet of 16 guage lamp cord, ran it between the supply and the sink, whipped out my meter and plugged her in.

Blind pig got good nose, brah.
Nailed it! :thumbsup:1st try.
Dimmers at max.= 10.82V.
'bout 1.25Amps per lamp.

Using 16 gauge, instead of 14 gauge lets me do some crude current regulation as well.
If the current load increases, so does the voltage drop in the supply line.
The heat is spread out evenly in the 6 feet wire which does feel a tad warm to the touch.
And now I can mount the 12V. 21 A. and the 15V 2.5 A power modules near the exhaust fan in the bloomery and take some weight and heat off the lamp.

Just put it into service today and found spider mites!
Guess I let my no-pest strip get 4 months old.
Ran right out and bought some fresh ones.
No want dese buggahs building a resistance.

They prolly rode in on a trojan clone.
(Geeks bearing gifts on the ides of April...)

Good to hear from you.

Feel free to take me to task for my less than conventional electriciacating.:rastasmoke:

Many hands make light work.

Wee Zard