How should you read COAST output and runtime figures?

A flashlight’s headline numbers answer different questions. Maximum output tells you about its brightest stated mode. Maximum runtime tells you how long another, often much dimmer, mode is rated to operate.

What does the XP11R table actually say?

The XP11R table gives output, runtime and beam distance for each mode — and no runtime at all for 3,000-lumen Turbo. The current XP11R listing publishes the following mode-specific figures:

Mode	Listed output	Listed runtime	Listed beam distance
Turbo	3,000 lumens	No runtime given in the displayed mode table	280 m
High	1,100 lumens	4.25 hours	165 m
Medium	380 lumens	7.5 hours	100 m
Low	160 lumens	17 hours	60 m
Moon Glow	12 lumens	200 hours	16 m

These are manufacturer specifications, not our measurements. In particular, the table does not say that the light sustains 3,000 lumens for 200 hours. Nor does a listed runtime alone establish that output stays flat from beginning to end.

The missing Turbo runtime is the kind of gap the portable-light industry’s own standard now addresses. PLATO’s 2025 revision of ANSI/PLATO FL 1 names these modes Short-Duration Elevated Brightness, measures their output, beam distance and peak beam intensity “between one and 10 seconds,” and states that “Runtime must always be included when reporting an SDEB mode.” The XP11R page doesn’t say which edition of FL 1, if any, its figures follow, so treat the gap as a question to ask rather than a finding against the light.

How would you compare lights for a task?

Decide what the light has to illuminate and for how long. Then compare the mode that is likely to serve that task, including its beam pattern. A focused beam and a broad flood distribute light differently, even at the same total output.

For checking something briefly, maximum output may be relevant. For a longer task, the usable setting, the charging arrangement and the plan for depleted batteries become more important. If a precise sustained level matters, look for a measured output-over-time curve or perform a controlled test rather than inferring one from the box.

The same habit applies across COAST’s range. The RL35R headlamp page lists a maximum runtime of 83 hours, while its per-mode rows give 2.5 hours combined, 6.5 hours flood and 6 hours spot. None of the listed mode rows carries the 83-hour figure, and the page doesn’t say which setting does.

What if a retailer lists different numbers?

Confirm the exact model revision and compare its packaging and manual with the manufacturer’s current page. Reused family names, older stock or incomplete retailer text can complicate comparisons. A discrepancy does not, by itself, prove which explanation applies.

The same care applies to battery type. A runtime measured with the supplied rechargeable battery should not automatically be assigned to an alternative set of disposable cells unless the manufacturer specifies that result. The XP11R lists “ZX1000 or 3 x AAA (Alkaline Not Included)” and publishes a single set of runtimes without naming the battery behind them.

Does beam distance tell you the whole story?

No — a maximum distance figure does not describe how evenly the near field is lit or how easy the controls are to use. Treat output, beam distance, runtime and handling as separate parts of the decision. Our headlamp lumen guide gives the broader measurement context.

For a product shortlist, return to COAST lights for camp and work or the COAST brand guide. Choose the operating mode and format you need rather than a combination of maxima the product never promises simultaneously.

The short version

Read every COAST figure against the mode it belongs to. On the XP11R, 3,000 lumens is Turbo, the 200-hour runtime is 12-lumen Moon Glow, and Turbo has no runtime listed at all — a gap the 2025 edition of ANSI/PLATO FL 1 now asks makers to fill for short-duration modes. The RL35R shows the same pattern from the other side: an 83-hour maximum that none of its listed mode rows carries. The XP11R takes a ZX1000 pack or three AAAs, but COAST publishes one set of runtimes without naming the battery behind it. Compare lights by the mode your task needs, its beam pattern and your recharge plan, and treat each number as COAST’s listing rather than a measured result.

Product information checked September 23, 2026, and rechecked October 3, 2026. This is a manufacturer-based selection guide, not an AllEquipped hands-on test. Official photograph used with permission.