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Technical Details
- Incorporates a foldaway stand, On/Off switch and hand strap
- Fitted with ultra-violet (blacklight) tube
- Powered by 4 x AA batteries (not supplied)
- Dual function - torch/tube lighting
- Approx dimensions: 160mm (L) x 20mm (W) x 55mm (H)
Product details
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Product Description
Lamp with built in blacklight projector - transparent blue
Features |
Specification | |
| Power supply | 6V (4 x AA) |
| Replacement lamp | 106.038 |
| Dimensions | 55 x 23 x 160mm |
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Customer Reviews
Most Helpful Customer Reviews
9 of 9 people found the following review helpful
The item is very small, smaller than expected. It will not show anything in daylight or if there is light coming in from another room. Must be darkness. We bought it to search for cat pee/spray, the last one we had did the job wonderfully, this one is very dim.
19 of 20 people found the following review helpful
The visible white LED torch section works fine, with a practical amount of light.
The UV is invisible of course, so you can't see how bright it is.
You only know it is on at all by the faint blue glow leaking from the purple tube glass.
Tested it out around the house. No fluorescence in or around the toilet, where there definitely would be urine.
In the name of science, I illuminated my own urine but was disappointed to not get the hoped-for amusingly surreal effect.
I notice that toilet paper and some other papers (but not all) fluoresced. Presumably the manufacturers add brightening agents to paper to make it whiter.
Washing powder glowed but not very strongly.
The quinine in tonic water did the same.
I found a couple of hidden markings on my credit card (the letters M and C), and on a ten pound note (the number 10 in red and yellow flecks - rather pretty).
The tube itself is marked as rated for 4 watts power, but either stuff isn't very fluorescent or this tube was not running as much as 4 watts.
I disassembled the lamp and found what I expected. There is a circuit board with a small transformer, a transistor, three resistors and three capacitors. The primary coils is part of a simple oscillator circuit, and drives the secondary coil to an AC voltage high enough to strike an arc in the tube without having to heat the coiled filaments at each end. This will probably be somewhat higher than mains voltage so take care! Don't make contact with the tube connections when on, with either fingers or bodily fluids. You might taser yourself!
With four AA cells, I measured 5.35 volts * 0.24 amps = 1.284 watts.
So assuming the circuit is about 80% efficient, the tube would be running at about 1 watt, a quarter of rated maximum.
The LED drains 18mA, at 3.4V, so about 60mW (c. 1/16th of a watt) power there.
I shall fit a white light tube to see how bright that is.
If it is dim, then the driver circuit isn't powerful enough.
If it is bright, then UV fluorescence effect must be weak.
Eventually I wish to drive an EPROM eraser tube, so I have to know how much power it is producing.
The UV is invisible of course, so you can't see how bright it is.
You only know it is on at all by the faint blue glow leaking from the purple tube glass.
Tested it out around the house. No fluorescence in or around the toilet, where there definitely would be urine.
In the name of science, I illuminated my own urine but was disappointed to not get the hoped-for amusingly surreal effect.
I notice that toilet paper and some other papers (but not all) fluoresced. Presumably the manufacturers add brightening agents to paper to make it whiter.
Washing powder glowed but not very strongly.
The quinine in tonic water did the same.
I found a couple of hidden markings on my credit card (the letters M and C), and on a ten pound note (the number 10 in red and yellow flecks - rather pretty).
The tube itself is marked as rated for 4 watts power, but either stuff isn't very fluorescent or this tube was not running as much as 4 watts.
I disassembled the lamp and found what I expected. There is a circuit board with a small transformer, a transistor, three resistors and three capacitors. The primary coils is part of a simple oscillator circuit, and drives the secondary coil to an AC voltage high enough to strike an arc in the tube without having to heat the coiled filaments at each end. This will probably be somewhat higher than mains voltage so take care! Don't make contact with the tube connections when on, with either fingers or bodily fluids. You might taser yourself!
With four AA cells, I measured 5.35 volts * 0.24 amps = 1.284 watts.
So assuming the circuit is about 80% efficient, the tube would be running at about 1 watt, a quarter of rated maximum.
The LED drains 18mA, at 3.4V, so about 60mW (c. 1/16th of a watt) power there.
I shall fit a white light tube to see how bright that is.
If it is dim, then the driver circuit isn't powerful enough.
If it is bright, then UV fluorescence effect must be weak.
Eventually I wish to drive an EPROM eraser tube, so I have to know how much power it is producing.
4 of 4 people found the following review helpful
It's a VERY small blacklight. When I turn mine on I have to shake it a bit because the batteries are quite loose inside, sometimes the connection is broken and it doesn't work. I was disappointed to be honest because I bought it for my piece in an art exhibition, but the black light wasn't strong enough to pick up the UV paint. It was only a small room (where the sink normally is in our graphics room) and it was in complete darkness but the light still didn't work as I had hoped.
On the other hand it did arrive really fast.
On the other hand it did arrive really fast.
Most Recent Customer Reviews
portable uv backlight with built in torch
i bought this as i wanted to see where the cats have been urinating in the house as i was told this was a good way of looking under a black light, but its not strong enough,... Read more
Published 1 month ago by smith1
Lasted about 3 minutes then blacklight failed and smoke came out of...
I was expecting cheap and flimsy but I wasn't expecting dangerous..
I popped the batteries into the unit, turned it on and used it to try to detect whether we had... Read more
I popped the batteries into the unit, turned it on and used it to try to detect whether we had... Read more
Published 2 months ago by C. Irwin
Magical light
The product requires 4 AA batteries. It took a bit of fiddling to get them in but is simple in construction and operation. Read more
Published 5 months ago by Strychnos
Good torch
This product is well worth it's money it's easy to use and highlights uv marks from about 2ft away. It's also good fun when it's dark am going to use it at haloween lol
Published 9 months ago by kozmo
black light review
This cheap little lamp will do the the job nicely. More performance than you expect from such a inexpensive product.
Published 18 months ago by Mr. Geoffrey Marles
UV light
Rather smaller than I thought and the UV light can only be used in almost darkness as it's just not strong enough to use in normal light.
Published 19 months ago by DickC
Perfect
Really cheap, good quality. perfect for checking id and notes. got to me 3 days before amazon said it would.
Published 19 months ago by TGC
Brilliant!
The delivery was quick, and the device is great! It functions as a UV Light bar as well as a torch; didn't know that when I ordered it! Read more
Published 20 months ago by WF
doesnt detect cat urine
i bought this to detect where my elderly cat had sprayed but it doesnt work even on obvious urine stains very disappointed
Published on 20 Nov 2009 by 3 cheers for Ray mears
another use ?
we went to a fancy dress, covered in neon glow face/hair/body/ paint and this little gadget helped us all glow !! lots of fun and now I can check my bank notes too !
Published on 10 Nov 2009 by Celia Waters
Listmania!
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