Build A "Westcott Spiderlite TD3" Backlight Kit
I love strobes, anyone who reads this blog knows it. But more and more I find myself attracted to the lure of continuous light. No pop blinks, no need for modeling light, and pupils are smaller. Kirk Tuck has a post about continuous lights with LEDs. Similar, not as intense but way cheaper solution is using CFL bulbs for lighting.
In the following post photographer Tony Zeh will walk us through building a CFL driven Westcott Spiderlite TD3 Backlight Kit. This backlight is part of his CFL based studio - check the last picture for more info about that.
While searching fluorescent backlight kits I found the awesome TD3 Backlight Kit
from Westcott (B&H) at about $369. I built my own with a 5500K fluorescent bulb for about $130 including stand.
Materials
- Acrylic Globe($10 Home depot)
- Light Base ($7 HD)
- cover plate($3 HD)
- cord and switch($6 HD)
- Sliver foil tape ($4 HD)
- Silver Paint ($4 HD),
- 5/8 light stand stud ($4 B&H)
- 3/8 x 3/4" bolt and washers
- 5500K day light fluorescent 27w or 45w depending on how much light you need. I have both and can switch it our based on my needs.
- Backlight stand ($20 B&H)
Step 1 - Prepare the globe mount
I used this globe, which is the largest one I could find at Home Depot.
This is the base you will attach the globe to. In the main picture you will see an added a riser to this to allow for the larger 45W bulb. The raiser was created using a 3 to 4" PVC pipe transition. ($2 for the riser at HD)
Drill a half-inch hole through the baseplate to run the wire.
Add a grommet so the metal would not cut into the cord.
Now it is time to attach the lighting stud. Do This using a couple of fender washers and couple of cut washers, a 0.375 x 0.75" long bolt and, of course, the lighting stud.
Step 2 - wire the light
This is where we put the standard electricity is dangerous warning. If you are not sure what you're doing, or lack the proper training, please, PLEASE get some help from a certified electrician.
You can use a standard extension cord for this. Cut it close to the socket part
Run the wire through the base plate and connect it to the lamp base using wire nuts.
Attach the bottom baseplate to the lamp base.
Add a switch to the wiring. I am not going to show how this is done. If you're not sure how to do it - go see your neighborhood electrician.
Step 3 - Coloring the globe
Tape over and cover half of that using painters tape and masking paper.
lightly sand the exposed half with the green scrubber pad, this will give some tooth for the paint to adhere
Use silver paint to paint on the outside of the globe. I had to do three layers to close any light leakage.
And the last step is to cover half of the interior with aluminum tape. do it in a way that will reflect the interior light towards the translucent side of the globe. The foil tape can be found in the heating duct area of the Home Depot.
There you have it
The globe finished
Sample Portrait and Setup
The portrait below was taken using the setup shows after. It employs an array of lights modifiers, all powered by CFL bulbs.


The backlight (a bit hidden behind the chair) is using a 27W CFL, the main soft box is using 3 27W CFL bulbs, I used 1 27W CFL in the kicker softlight box and a 27W CFL in the hairlight small octo-box.
Have you used continuous lighting? Do you like it? In a poll we had about a year CFLs were popular with only 4% of DIYP readers. Has this changed? Share with us in the comments.
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Comments
riser
In your article, you mentioned something about a "riser" that would be explained later in the article. I seem to have missed it :) And more details on how to do it etc? Also, any SKUs or UPC codes for the parts from Home Depot?
Many thanks! This looks like a Holiday week project!!
Tom
CFL Lighting
Nice idea on the backlight! Looks like it distributes the light well but doesn't send any spill forward. Definitely a more polished DIY solution.
I've been using the CFL lights that equate to 150W, but for the back light I use a standard industrial metal dish. I've found the lights work great for video, but I still prefer using strobes for photos so I can get the ISO down and shutter speed up. Definitely a viable alternative if you don't have the cash for a couple speedlights though!
Thanks for the post!
Foil tape
Should you cover the bowl entirely on half the inside? That kinda makes the silver paint unnecessary, doesn't it?
And could you paint the inside instead? Just to give it a more "smooth" sufarce? :)
Love it
Excellent DIY and detailed instructions.
Great work!
Vojin
Some Questions answered
I used the silver paint, that was similar to that of the Westcott lighting. I would use silver foil on the inside because it is more reflective than the duller silver paint. The paint on the outside then covers the not so perfect tape job. Also the tape helps stop any leakage of light back on your subject if you paint too lightly.
The riser can be seen at http://www.flickr.com/photos/parkett/5196445758/in/set-72157625315189937/. It was a 3" to 4" PVC transition coupler (white) that I painted to match the housing.
I took a workshop with master Photographer Clay Blackmore who taught using (Monte Zuckers) style of lighting using Continuous CFL's. It was great because you could move the lights easily and see immediately what you were going to get before you took the shot. I have a set of studio strobes, but this make everything ten times as easy and no recycle time. So if your model is moving a little, you can do bursts of shots and grab the best one, especially great with kids.
Question about light temp
Sorry if this is a noob question but if you use a strobe (speedlite) with the cfl lighting do you need to use a color correcting gel for the speed lite? If so what would it be?
Cheers
Color Temp Question
If you are shooting with a continuous set up, I probably wouldn't mix strobes and CFL, but the CFL's should be Daylight (5000K -5500K) Many Speedlites run daylight at 5000k-6000k So there shouldn't be a problem if you get the correct CFL's. I found Home Depot just dropped priced on their 27W Daylight CFL (100w incandescent equivalent) to just under $4 for two bulbs (5000k) many of the ones found online are more pricey but fall closer to the middle spectrum of daylight at 5500k. Hope that answers your question.
Color Temp follow up
I've noticed that the CFL lights also have a tint that needs to be corrected for. It may be more dramatic in the 2700K bulbs, but I just use the custom white balance feature to clean up the tint issue and warmth in one shot.
Interesting DIY
Great DIY! Had to drop you a line! And thanks for the shoutout to Westcott!! Much appreciated - even though you did build your own ;)
Best of luck in all your photography! ~Amber @ Westcott
Thanks...
Copying is the biggest form of flattery they say. Maybe one day I can afford the real thing. Westcott does a great job! who better to emulate.
Since I am just starting out,
Since I am just starting out, I really don't have experience with strobe lighting. I have used continuous lighting for everything. I like to know right then and there what I am getting. Thanks for sharing all of these wonderful lighting ideas. As soon as is gets warmer outside I will be working on backgrounds to share. Hopefully I will have a nice lighting setup to share also.
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