The dome light for the work bench is a some
what success. I didn't check amp draw. The
lamps are dimmer than filament bulb. I used
to find that one bulb was plenty of light, but
a lot of amp draw. With the new LED, two
bulbs is almost as bright as one filament.
Presumably less amp draw.
The Harbor Freight magnet light with 24 LED
on the side is actually brighter than the RV
Overall, it's reasonable, but not great. With
both bulbs lit, it's enough light to work.
Description: Car 1156 382 Tail Brake Turn Signal WHITE 9 LED
Bulb Lamp Light BA15S P21W 12V , Item# 140624170223
I found some LED panels for replacing the lamp in stairwell lights
that were really bright a couple of years ago. They had some resistors
on them that dropped the 120 VAC down to something the diodes could
use. I would expect that these could be adjusted to run off of 12
volts easy enough. We use them at work in a stairwell. When I'm on one
night I'll pull the cover off of one and see if I can find the
manufacturer and part #.
I don't recall your answer from the previous thread:
Why don't you want to use an inverter and a decent 120V light fixture?
It seems like a simple solution to me, but of course I don't know all
of the variables involved.
On Fri, 18 Nov 2011 12:02:16 -0500, "Stormin Mormon"
How many lumens is the filament bulb?
has (somewhat expensive) 400 lumen 12 volt bulbs for $32 + shipping.
I haven't purchased from them, they're just on my list of possible
re: "If he doesn't have an inverter..."
...odds are he doesn't have 6 dome lights and a proper aluminum bar.
Which do you think will be easier to obtain?
re: "and a decent sized battery setup..."
And your suggestion addresses the "decent sized battery set-up" how? 6
dome lights is going to require as much battery (if not more) than an
inverter and worklight.
So, instead of going to HF and spending $30 on an inverter and $15 on
worklight, you're suggesting a trip to the wrecking yard, snagging
dome lights from wrecks, getting bulbs from Autozone, getting a proper
aluminum bar and then building a switched fixture and mounting it?
Plug and play vs. a relatively fair amount of work?
I'm not saying he should go the inverter route, but your suggestion
doesn't seem like a reasonable alternative when viewed from the same
"no parts" starting point..
No argument there...although I think my ~$50 solution is a decent
compromise compared to a $600 solution, and certainly fits your
"investing" criteria better than $8.50 worth of parts from a junk yard.
(PST) typed in rec.crafts.metalworking the following:
there is also the problem of "We can't afford to be cost
effective" - which leads to the ten buck and scrounged parts option,
vs "time is money" and just buy the damn thing.
Years ago, I spend an afternoon trying to change the tire on a
trailer. Dual axle, raise one the other droops, can't get enough
height to get the tire off the ground. It starts to get dark, I bite
the bullet, and rent a proper floor jack. Hour later I'm done,
returning the floor jack, and able to rejoin my friends.
What ever works for you.
Go not to the Net for answers, for it will tell you Yes and no. And
Ooh! Good idea! I've got a baseball-style work cap that has three LEDs
mounted in the bill. They put out more than sufficient light for close work
and can be turned on and off by squeezing the switch on the bill itself.
<Huge Snip - I ignore posts over150 lines, that's Political Diatribe
The main point of this whole falderal is... You need a lot of light
to do fine work. But when you're working off a car alternator and deep
cycle batteries you need the absolute Most Bang For Your Buck - or in
this case the Most Lumens for your Watt.
Doing /anything/ with an inverter kicking the power up to 120V is a
huge loss, because then the fixture has to convert it yet again to get
where the electricity is going.
12V RV Fluorescents are better, but for the best efficiency you need
to run the lights at their native voltage - and with LED's that's in
the 2V to 6V range DC. You simply have to regulate the current and/or
voltage to them.
He tried a LED Dome Light and it wasn't enough? Get a more efficient
LED fixture, a more focused one like one of the new fancy swivel-mount
PAR36-style LED Work Lights from Truck-Lite, or more of them.
Or get some high-power 3W or 5W Luxeon LED's, and a big hunk of
heat-sink extrusion to mount them on - or they'll pop in seconds.
Switch the lights in stages so you can turn them down as needed - when
your bald spot starts to burn, that's a clue. ;-P
Inverters are wonderful for power tools and the like if you have the
whole chain - Oversized alternator, diode isolator, dual batteries
with a Deep Cycle for the secondary power, heavy cabling, and the
inverter big enough for the job.
Bonus Points for an idle kick solenoid, or the ECU Computer having
enough smarts to kick the idle when the battery starts fading. (I
don't think they do that normally - pity.)
Charging power tool batteries, get the 12V charger - they all have
them, DeWalt's works wonderfully. Though I need to hard-wire it, too
much juice for the replacement lighter plug. (The factory lighter
plug for it got crunched in the door...)
And you do NOT run lighting loads or long-term things like a heater
or refrigerator off an inverter - get 12V lights, a 12V RV Furnace and
a gas fridge and mount a Propane bottle.
Shoulda trimmed off the base of the Adrians, at least the ones on the
street-side - too much wasted space at the back that you can't get to.
Been there, Dig the fall-offs out of the bottom every so often.
On the curb-side you can line the back of the shelves and van wall
with paneling, get at it through the side doors, and have a safe place
to stash sheet metal, glass, plastic goods and broken-down boxes.
Oh, and if the OP's or your van doesn't have them, make door liners
for the side and rear doors out of paneling - Crap WILL fall in there
- or worse, a helpful person will try to store stuff in the doors...
And either jam the locks (shut, naturally) or just rattle around while
driving and drive you bat-shit insane. DAMHIKT. X100.
--<< Bruce >>--
On Sat, 19 Nov 2011 08:25:17 -0500, "Stormin Mormon"
This is inside a running and drivable van with a 12V system? You
certainly aren't going to get much usable power out of a couple of
Dry Cells, and they get expensive if you burn through a set every few
If you have to have a portable power source, go get a loose BCI Group
24DC (90 AH) or 27DC (105 AH) Deep Cycle RV/Trolling Motor battery and
a plastic Trolling Motor battery box that has an accessory power
socket - check at West Marine or a boat store. And a small hand-truck
to cart it around - lead is heavy.
And you need a small 120V battery charger you can plug in at home.
Then get a couple of the import LED Backup Lights, or the LED Work
Lights, a roll of 16-GA lamp cord, and a cigarette lighter accessory
plug. Or if you prefer fluorescents, a ThinLite RV fixture or two.
Mount the lights over your workbench area, spread apart wide so you
can't lose your work in the shadows of your hands. Run the lamp cord
over to the lighter socket, and plug it in.
Caveat #1) Car Lighter sockets have non-repairable thermal fuses
inside the socket end, you are limited to about 3A continuous, 10A for
20 to 30 seconds On, 10 minutes Off. Then the "Magic Smoke" escapes,
and the lighter socket stops working.
That means any inverter over 300W or so is OUT. And tire air
compressors, 12V saucepans and 12V coffee pots too.
Unless you like changing out the lighter sockets every week, you get
an Accessory Power Socket (looks the same on the outside, different
insides that won't work a lighter element) and wire it straight to the
battery - with a fuse at the battery.
No current limit other than the proper size fuse protecting the wire
going from socket to battery. And if you use 12-3 extension cord
from the battery to under the dash the outer jacket protects the wire
from grounding out, and you can put up to three circuits on it if you
ever come up with more things to power, like a CB.
Caveat #2) Car starting batteries WILL NOT take deep cycle loads AT
ALL - you need to have the engine running when powering anything more
than the few milliamps for the clock and the 1A Dome Lights for a few
minutes only. DO NOT sit there in Accessory running the radio half
A dozen deep cycles (just like leaving your headlights on overnight)
and the starting battery is toast. You need to install a Deep Cycle
battery somewhere in the back of your rig, or in that empty second
battery spot on the other side of the engine compartment they left for
Diesel cars - or move the gasoline engine emissions crap out of the
non-empty second battery space so you can install it there.
(On my LandCruiser I had to shuffle the VSV's further back on the
fender and extend a few hoses, and stuff the Air Pump muffler under
the fender and extend it's hose. Then you have a space.)
Then hook up the charging circuit with a diode isolator and a
regulator reference line to the alternator, or relay isolator if you
want cheap quick and easier.
Caveat #3) The charge isolator relays are rated for continuous duty,
the Ford style starter solenoids are NOT - their duty-cycle is roughly
15 seconds on, 15 minutes off. They might look the same, and the
Ford relay is temptingly cheaper, but they do NOT work the same. (Gee,
do you smell something burning?)
--<< Bruce >>--
How about waiting until after Christmas and buy white LEDS when they go
half-off. You can make a pretty bright fixture if you cluster them and
maybe even use a parabolic reflector. Should run on 12V with a little
"I don't like to discriminate against terrorists based on nationality.
If you declare war on the United States and you want to kill us,
That's because you're buying crap.
I spent a lot of money on crap LED conversion bulbs before I figured
out that you look for LEDs with at least the same lumens output as the
Now in my camper with all four overhead lights burning, I can perform
surgery. It's that well lit. Sum total energy consumption for the four
LEDs is less than one filament bulb.
The units I ended up with were flat boards with 9 high-intensity LEDs
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