“I don’t have time to send it in for calibration.” “Calibration cost is expensive.” “I want to use the same standard for multiple luminance meters.”
Introducing a reference light source with stable brightness and high reproducibility is an effective solution to these issues.

Tsubosaka Electric offers industrial diffused surface light sources that ensure high uniformity over 95% in brightness, color temperature, and stable luminance values all-times.

High Uniformity Ra over 95	Reproduce any color temperature	Stable luminance

We offer light sources for calibration that are ideal for assisting with luminance meter calibration and differential management.

A stable reference light source ensures reliable daily inspections and differential management of multiple luminance meters.

Our lineup includes brightness settings ranging from a single fixed point to an adjustable type that can reproduce any luminance value by using a numeric keypad.
You can choose the model that best suits your application.
For more details, please see the product page below.

Model	VLB-10FBW2-CRI	LSB-1010FBW-CRI	LSB-1010WCRI
Luminance Range	Register luminance for 10 points (LV) 7.0 – 14.0 (c d/㎡) 20 – 2,500 (rlx) 50 – 7000	(LV) 8.0 – 15.0 (c d/㎡) 36 – 4,585 (rlx) 100 – 15000	(LV) -1.0 – 16.5 (c d/㎡) 0.1 – 13,000 (rlx) 0.22 – 40000
Correlated Color Temperature (K)	Select 2 from below ・3200±150 ・5500±500 ・6500±500	Select 2 from below ・2850±100 ・3200±100 ・4870±200 ・5500±200 ・6500±300	Select 2 from below ・2850±100 ・3200±100 ・4870±200 ・5500±200 ・6500±300
Operation	Switch pre-registered luminance with touch of a button	Type in any luminance by numeric keypad	Use numeric keypad to reproduce any brightness level from low to high
Optional Function	・Change luminance surface size ・Add flicker function ・Expand luminance range.	・Change luminance surface size ・Add flicker function ・Expand luminance range.	・Change luminance surface size ・Add CT mode to type in any color temperature from 2850~6500K. ・Expand luminance range.
Dimension (WxHxD)[mm]	187 x 194 x 56	223 x 269 x 253	344.5 x 320.6 x 441.8
Weight [kg]	0.5	4.5	16.7
Price	Low	Medium	High
Product Page	https://www.tsubosaka.co.jp /archives/product/vlb-10fbw2-cri	https://www.tsubosaka.co.jp /archives/product/lsb-1010fb-series	https://www.tsubosaka.co.jp /archives/product/lsb-1010wcri

We recommend to calibrating this light source box once a year, so it’s not completely maintenance-free,
but it can support operation that is closely aligned on-site.

And best of all, it makes daily inspections much easier.

We will suggest light sources based on your budget. Please feel free to contact us.
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