OESX vs LEDS vs EFOI vs ARAY vs POWI

For growth investors, SemiLEDs Corporation (LEDS) is the stronger pick with 729.

8% revenue growth year-over-year, versus -15. 0% for Energy Focus, Inc. (EFOI). Power Integrations, Inc. (POWI) offers the better valuation at 184. 2x trailing P/E (55. 5x forward), making it the more compelling value choice. Analysts rate Power Integrations, Inc. (POWI) a "Buy" — based on 16 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

Over the past 5 years, Power Integrations, Inc.

(POWI) delivered a total return of -8. 3%, compared to -93. 9% for Accuray Incorporated (ARAY). Over 10 years, the gap is even starker: POWI returned +232. 7% versus EFOI's -98. 3%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Energy Focus, Inc.

(EFOI) is the lower-risk stock at 0. 49β versus Accuray Incorporated's 2. 42β — meaning ARAY is approximately 399% more volatile than EFOI relative to the S&P 500. On balance sheet safety, Energy Focus, Inc. (EFOI) carries a lower debt/equity ratio of 13% versus 2% for Accuray Incorporated — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), SemiLEDs Corporation (LEDS) is pulling ahead at 729.

8% versus -15. 0% for Energy Focus, Inc. (EFOI). On earnings-per-share growth, the picture is similar: Accuray Incorporated grew EPS 90. 3% year-over-year, compared to -30. 4% for Power Integrations, Inc.. Over a 3-year CAGR, LEDS leads at 82. 7% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Power Integrations, Inc.

(POWI) is the more profitable company, earning 5. 0% net margin versus -32. 6% for Energy Focus, Inc. — meaning it keeps 5. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: POWI leads at 4. 8% versus -37. 9% for EFOI. At the gross margin level — before operating expenses — POWI leads at 54. 5%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

In this comparison, POWI (1.

2% yield) pays a dividend. OESX, LEDS, EFOI, ARAY do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Energy Focus, Inc.

(EFOI) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 49)). Accuray Incorporated (ARAY) carries a higher beta of 2. 42 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (EFOI: -98. 3%, ARAY: -94. 5%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

These companies operate in different sectors (OESX (Industrials) and LEDS (Technology) and EFOI (Consumer Cyclical) and ARAY (Healthcare) and POWI (Technology)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: OESX is a small-cap quality compounder stock; LEDS is a small-cap high-growth stock; EFOI is a small-cap quality compounder stock; ARAY is a small-cap quality compounder stock; POWI is a small-cap quality compounder stock. POWI pays a dividend while OESX, LEDS, EFOI, ARAY do not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.