# Is there an inexpensive CRI 95 ~10W LED available in the UK?

**URL:** <https://forums.kinograph.cc/t/is-there-an-inexpensive-cri-95-10w-led-available-in-the-uk/2595>\
**Category:** Machine Design\
**Created:** [August 25, 2023, 5:33pm UTC](https://forums.kinograph.cc/t/is-there-an-inexpensive-cri-95-10w-led-available-in-the-uk/2595 "2023-08-25T17:33:26Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![PM490](https://forums.kinograph.cc/user_avatar/forums.kinograph.cc/pm490/32/3176_2.png) [@PM490](https://forums.kinograph.cc/u/PM490)\
**Post date:** [August 28, 2023, 2:54am UTC](https://forums.kinograph.cc/t/is-there-an-inexpensive-cri-95-10w-led-available-in-the-uk/2595/6 "2023-08-28T02:54:24Z")

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> [@bassquake](#):
>
> using a large sphere although haven’t decided yet.

This decision will drive how much light power the LED will need.  
The project that you show is 8mm film (Regular and Super 8). Typically the sphere required is not large if it is for 8mm only.

> [@bassquake](#):
>
> f I cant find a CRI95 led, can I achieve the same with a RGBW led?

High CRI is somewhat the opposite of discrete RGB LEDs. It may be best to look at the White LED datasheet spectrum profile.

> [@SnailScanToo or 2](https://forums.kinograph.cc/t/snailscantoo-or-2/2548/1):
>
> The prototype uses prior-design-existing LED PCBs, and the part of the constant-current [driver](https://forums.kinograph.cc/t/another-led-driver-simple-scalable-controllable) previously shared. Each PCB has four [LED](https://www.bridgelux.com/resources/bridgelux-ds310-smd-2835-1w-9v-thrive-data-sheet-20191006-rev)s, each LED is driven at about 0.7 watts. The LEDs are rated with a CRI\>95, see the 5000K curve.
> 
> ![20230607 LED](https://forums.kinograph.cc/uploads/default/original/2X/2/2dc18f00bcb5b6efaf663056dc237fe960f2e7d5.png)

These are the White LEDs I am using (5000K), with a custom designed PCB. The LED subject and quality is a recurring theme in the forum. If the interest (and patience) is there, this may be an opportunity to collaborative design the best form factor for a PCB.

> [@Sharing DIY 8mm / Super 8 project for feedback](https://forums.kinograph.cc/t/sharing-diy-8mm-super-8-project-for-feedback/1425/24):
>
> This picture is a good illustration that -at least for me- the 8mm DIY scanner is a journey.  
> From top to bottom:
> 
> - The first light with LED strips arranged
> - Same for the second with better box and better diffuser
> - First sphere trials using an oversized ping pong ball and LED strips
> - Second sphere trials with smd LEDs.
> - And lastly, the PCB to assemble the new light/sphere.
> 
> ![2021-10-13 10.38.31](https://forums.kinograph.cc/uploads/default/original/2X/f/f8cdbb13eb91838e639fbcfbc9d2a03ce42a1e68.jpeg)

The PCB at the bottom is what I have been using with the LEDs above, first in a small oversided ping-pong ball, and now three in a 90mm metal sphere.

> [@SnailScanToo or 2](https://forums.kinograph.cc/t/snailscantoo-or-2/2548/1):
>
> Plenty of light, and too much to use continuously at full power (unless baking something).
> 
> ![2023-06-05 12.54.05](https://forums.kinograph.cc/uploads/default/original/2X/9/9205c1814d6dc5c5ff760a82421f60174e60869f.jpeg)

The SMD LED retail cost is about US 35 cents, and PCBs are not that much.  
Note that these LEDs have a particularly large Vf of 9V, so typically it will require a 12V power supply (or more if connected in series). In the large sphere above I use a 32V power supply.

PS. As you can see from Manuel results, you can have good results without the complication of building the LED/PCB, so please take the above as an illustration, not a recommendation.

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