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How do I build a variable light source?

I recently saw a device at my friend's house that was a box with four lights at the ends of bendable wires. The lights were dimmable and the entire box had a plug for an outlet to avoid using batteries. If anyone knows the name of this device or even how to build one/instructions on a DIY website that would be terrific. This would be used for for macro/stock photography.

Buy 4 cheap clip-on lamps. Strip the plug heads off, and attach to a large rheostat. Ac power through rheostat to lamp heads... then you turn the dial to adjust light.

Look for a lamp dimmer switch at the local hardware store. Make sure you know the max wattage it can handle!

Even better, build it in two sections, left and right or top and bottom, so that two of the lamps are on one controller, and the other two are on a second controller. Ratio lighting has never been easier...

DIY Lightbox for product photography

Lifemax Light Pod 107a SAD Portable Simulated Daylight Box £39.40 ...

Megaman BR0711i Ingenium GU10 Spot Bulb 11W Warm White £2.00 ...

LED Lenser 8407 P7 Torch in Gift Box (Black) £33.99 LED Lenser P7 Black Torch - Gift Box LED8407 The P7 Tactical should be standard equipment on every duty belt. With 200 lumens of focusable light and 130 hours of battery life from standard AAA batteries, it will far outshine any other light of its size.- Advanced Focus System - Spot to Flood Beam- Lightweight Aircraft Aluminium Casing- One Handed Speed Focus- Quick - Cycle Switch System - Touch fo...

Portable Photo Studio Kit including Tent + Lights + Tripod £28.99 Combine your digital camera with this kit, and you'll have everything you need to get great shots. In less than a minute, you can have everything out of the case, set up and ready to use. When you're done, it is just as quick to take down and store.Contents :- - Studio Surround, Size: 40cm x 40cm x 40cm - Two lights on stands (Caution - Lamps get extremely hot when in use, do not touch, Maximum Su...

PhotoSEL LS21E52 Professional Softbox Studio Lighting Kit with 2x85w 5400K CRI>90 Bulbs, 40x60cm Softboxes £119.99 If you have been trying to shoot pictures with an accurate colour representation of the items you are photographing it is very likely that you have been relying on special filters and/or software editing to improve the results. With the PhotoSEL LS21E52 Professional Studio Light Set, this may well be a thing of the past. Rather than providing inferior quality 6400K bulbs (as many other sellers do)...

Pro 160-LED Video Camera Light for canon 1Ds,5D,7D,40D,50D,60D,500D,550D,600D,1000D,1100D,Nikon D700,D300,D400.D200,D90,D60,D3,D2,D1,D7000,D5000,D3100,D3000,Olympus E620,E520,E510,E500,E420,E3,E1,E-P1,EP2,EPL-1,EPL-2,Panasnic LX5,GH1 GF1 GF2,Pentax,Fuji,Sony DSLR/SLR & Camcorders £36.99 60 LED lamps. Suitable for video taking, either for lights setup or supplement. Symmetrical light output. Uniform illumination brightness. 16-level-adjustable light output. Wide operating voltage. Compatible with seven different kinds of batteries: Panasonic CGR-D16S/CGR-D220, Sony NP-FH70/NP-FM55H/NP-F550 Ni-MH and AA batteries. With LED indicators, can show battery capacity by simply pressing th...

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