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Graham Number is a figure that measures a stock's fundamental value by taking into account the company's earnings per share and book value per share. The Graham number is the upper bound of the price range that a defensive investor should pay for the stock. According to the theory, any stock price below the Graham number is considered undervalued, and thus worth investing in.
As of today (2026-08-31), the stock price of Tons Lightology is NT$16.80. Tons Lightology's graham number for the quarter that ended in Jun. 2026 was NT$N/A. Therefore, Tons Lightology's Price to Graham Number ratio for today is N/A.
The historical rank and industry rank for Tons Lightology's Graham Number or its related term are showing as below:
During the past 13 years, the highest Price to Graham Number ratio of Tons Lightology was 1.45. The lowest was 0.50. And the median was 0.80.
ROCO:4972's Price-to-Graham-Number is not ranked *
in the Furnishings, Fixtures & Appliances industry.
Industry Median: 1.17 * Ranked among companies with meaningful Price-to-Graham-Number only.
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
Tons Lightology (ROCO:4972) Graham Number Explanation
Ben Graham actually did not publish a formula like this. But he wrote in The Intelligent Investor (1948 version) regarding to the criteria for purchases:
Current price should not be more than 15 times average earnings of the past three years.
Current price should not be more than 1.5 times the book value last reported. However, a multiplier of earnings below 15 could justify a correspondingly higher multiplier of assets. As a rule of thumb we suggest that the product of the multiplier times the ratio of price to book value should not exceed 22.5. (This figure corresponds to 15 times earnings and 1.5 times book value. It would admit an issue selling at only 9 times earnings and 2.5 times asset value, etc.)
Unlike valuation methods such as DCF or Discounted Earnings, the Graham number does not take growth into the valuation. Unlike the valuation methods based on book value alone, it takes into account the earnings power. Therefore, the Graham Number is a combination of asset valuation and earnings power valuation.
In general, the Graham number is a very conservative way of valuing a stock. It cannot be applied to companies with negative book values.
Tons Lightology's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Jun. 2026 )
=
16.80
/
N/A
=
N/A
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Be Aware
Please keep these in mind:
1. Graham Number does not take growth into account. Therefore it underestimates the values of the companies that have good earnings growth. We feel that if the earnings per share grows more than 10% a year, Graham Number underestimates the value.
2. Graham Number punishes the companies that have temporarily low earnings. Therefore, an average of earnings makes more sense in the calculation of Graham Number.
3. Graham Numbers underestimates companies that are light with book.
Tons Lightology Graham Number Related Terms
Tons Lightology Graham Number Historical Data
* Premium members only.
The historical data trend for Tons Lightology's Graham Number can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
ROCO:4972 vs SN, SGI, MHK: Graham Number Comparison
For the Furnishings, Fixtures & Appliances subindustry, Tons Lightology's Price-to-Graham-Number, along with its competitors' market caps and Price-to-Graham-Number data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Tons Lightology Price-to-Graham-Number vs Furnishings, Fixtures & Appliances Industry
For the Furnishings, Fixtures & Appliances industry and Consumer Cyclical sector, Tons Lightology's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Tons Lightology's Price-to-Graham-Number falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Tons Lightology (ROCO:4972) has a Graham Number of NT$N/A as of Jun. 2026. The Graham Number values a company based on its per-share earnings and book value. View historical data on Tons Lightology and its competitors. According to the industry distribution chart, Tons Lightology ranks #999999 out of 282 companies in the Furnishings, Fixtures & Appliances industry.
Is Tons Lightology's Graham Number too high?
Tons Lightology's current Graham Number is NT$N/A. Based on the distribution chart, Tons Lightology ranks #999999 out of 282 companies in the Furnishings, Fixtures & Appliances industry, which is in the bottom quartile relative to peers. Overall, Tons Lightology has a GF Score™ of 67/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Tons Lightology's Graham Number compare to SN and SGI?
According to the Furnishings, Fixtures & Appliances industry distribution chart, Tons Lightology ranks #999999 out of 282 companies for Graham Number. This places Tons Lightology in the lower half of its industry. The industry median Graham Number is 1.17. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Graham Number for a Furnishings, Fixtures & Appliances company?
The median Graham Number among Furnishings, Fixtures & Appliances companies is 1.17, based on 282 companies in the industry. Companies in the top quartile (top 25%) have a Graham Number significantly above this median, while those in the bottom quartile fall well below. However, Graham Number should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Graham Number mean?
A high Graham Number can signal that a stock is expensive relative to its fundamentals. The Graham Number values a company based on its per-share earnings and book value. View historical data on Tons Lightology and its competitors. For the Furnishings, Fixtures & Appliances industry, the median Graham Number is 1.17 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Tons Lightology's current Graham Number is NT$N/A. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Tons Lightology stock overvalued right now?
Based on GuruFocus' analysis, Tons Lightology (ROCO:4972) is currently considered Fairly Valued. The stock's GF Value™ is NT$18.56, compared to a current price of NT$16.80 — trading 9.5% below its estimated fair value. The current Graham Number is NT$N/A. Tons Lightology's overall GF Score™ is 67/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Graham Number calculated?
Graham Number is calculated from a company's financial statements. For Tons Lightology (ROCO:4972), the current Graham Number is NT$N/A as of Jun. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Tons Lightology (ROCO:4972) Overvalued in 2026?
Based on GuruFocus' analysis, Tons Lightology stock appears to be undervalued.
The current stock price of NT$16.80 is trading 9.5% below its estimated GF Value™ of NT$18.56.
GuruFocus considers Tons Lightology to be Fairly Valued.
Key valuation signals for ROCO:4972:
Graham Number: NT$N/A
GF Value™: NT$18.56 vs. price of NT$16.80 (9.5% below fair value)
No single metric tells the full story. See the ROCO:4972 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Tons Lightology Inc engages in the design, manufacture, and sale of commercial lighting fixtures. The company's operating segment includes Tons Lightology Inc; Titan Lighting Co. Ltd, Zhongshan Tons Lighting Co. Ltd, and StrongLED Lighting System (Cayman) Co. Ltd. It generates maximum revenue from the Tons Lightology Inc. segment. Geographically, it derives a majority of revenue from Europe and also has a presence in Asia, Oceania, and other countries. It focuses on indoor lighting and outdoor lighting. The company's products are used for museum/gallery, commercial, hotel, club, office, and Outdoor applications.
67GF Score
Get the complete analysis for ROCO:4972
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