Choosing an L-Series™ UV LED Flood Lamp by Curing Area — A Model-by-Model Walkthrough

Picking a UV LED flood lamp for a large part usually starts with one question — which model’s curing field actually covers the footprint — and the answer changes the intensity, the chamber, and the exposure time that follow.

Q: How do you choose an L-Series™ model for a large curing area?

A: Start from the largest footprint that must cure in one exposure, select the smallest L-Series™ curing field that fully contains it, then confirm that model’s intensity delivers the material’s required dose within the available cycle time. If it doesn’t, either step to a smaller field and index the part, or move to the water-cooled W-Series™ at the same area.

The Nine Curing Fields, in Square Inches

Converting each model’s field to area makes the comparison easier, because parts are rarely square. All intensities below are Incure’s published figures at a 2-inch working distance.

Model	Field	Area (in²)	Intensity (mW/cm²)
L11	1″×1″	1	4,300
L22	2″×2″	4	4,300
L33	3″×3″	9	3,100
L44	4″×4″	16	3,100
L64	6″×4″	24	1,900
L88	8″×8″	64	1,900
L1010	10″×10″	100	1,900
L1212	12″×12″	144	1,900
L1414	14″×14″	196	950

Two step changes stand out. Moving from L44 to L64 adds 8 in² of coverage and drops intensity from 3,100 to 1,900 mW/cm². Moving from L1212 to L1414 adds 52 in² and halves intensity from 1,900 to 950 mW/cm². Between L64 and L1212, coverage grows six-fold with no change in quoted intensity, which makes that band the efficient zone for mid-to-large parts.

Fit the Shape, Not Just the Area

Area alone can mislead. A 5″×2″ strip has 10 in² of area, which looks like an L33 job on paper, but it will not fit inside a 3″×3″ field. The deciding dimension is the longest side of the part. L64 is the only rectangular field in the line, which suits elongated parts such as long connector housings or narrow display strips that would waste most of a square field.

Converting Intensity Into Exposure Time

Dose equals irradiance multiplied by time, so the exposure needed scales inversely with the model’s intensity. Consider a hypothetical material that requires 3,800 mJ/cm²:

Under an L1212 at 1,900 mW/cm², the exposure is 3,800 ÷ 1,900 = 2 seconds.
Under an L1414 at 950 mW/cm², the same dose takes 3,800 ÷ 950 = 4 seconds.
Under an L44 at 3,100 mW/cm², it takes roughly 1.2 seconds, but only a 4″×4″ area is covered.

The figure of 3,800 mJ/cm² is illustrative only; use the dose from your own material data sheet and verify it with a radiometer at the production working distance.

Email Us with your part outline and required dose, and Incure’s engineers can run the same calculation against every L-Series™ model before you commit.

When to Index Instead of Covering in One Shot

Covering the full part in a single exposure is not always the right call. If a part measures 13″×13″, an L1414 covers it in one shot at 950 mW/cm². An L1212 at 1,900 mW/cm² would need four overlapping positions to cover the same part. With the hypothetical dose above, that is four 2-second exposures, or 8 seconds of lamp time plus handling, against 4 seconds in one shot. Indexing only pays off when the part needs few positions, or when the material needs higher irradiance rather than just more total dose. Single-shot coverage also removes the overlap seams, where a zone can be missed or exposed twice.

Matching Field Size to the Work

The field-size bands line up with recognizable kinds of work. Full-board conformal coating, underfill sealing, and SMD component bonding tend to land in the mid-range models, where uniform exposure across the whole board prevents partial cure at the edges. Batch curing of dome coatings and encapsulants on several parts per cycle draws on the larger L1010, L1212, and L1414 fields, which cover a tray of components instead of indexing them one at a time. Small, high-energy cures on single components suit L11 through L44.

Chamber and Control Follow the Model

The model choice also sets the enclosure. L11 through L44 pair with Incure’s C131C, C131D, and C141C chambers; L88 through L1414 pair with the C191C. L64 is not named in either published pairing, so confirm its enclosure with Incure before planning a chamber-based station. Every model accepts foot-switch, PLC, and RS232 signals in timer or continuous mode, so moving between models does not change the control architecture.

When the Air-Cooled Line Runs Out of Intensity

If the calculated exposure time is longer than the cycle allows, the water-cooled W-Series™ offers the same 4″×4″ and 12″×12″ fields at higher output: W44 at 8,100 mW/cm² against L44’s 3,100, and W1212 at 3,100 mW/cm² against L1212’s 1,900, both at 365 nm. Using the hypothetical 3,800 mJ/cm² above, W1212 would need about 1.2 seconds instead of 2. The trade-off is a facility water supply alongside power, covered in Incure’s W-Series™ water-cooled guide.