DIY Proposal 01 — Lighting + CO₂ (LOCKED)
Status: subsystem 1 locked, 2026-04-11. Reflects user decisions: bare boards + Meanwell drivers as kits, on-board UV, SuperPro GEN-10 for CO₂, VAT-reclaimable business, solar power planned (energy efficiency premium not needed → regular LM301H not EVO).
Replaces: vendor_teardown/03_lighting.md — Green Jungle bills € 15 596 for 24× €399 no-brand "800 W" top + 36× €90 intercanopy + 14× €100 UVC + 24× €43 veg + 12× €29 clone (no CO₂ hardware quoted).
Strategy
Named-chip Samsung LM301H supply chain, sourced as bare board + Meanwell driver kits direct from Kingbrite, with CO₂ enrichment hardware that the vendor never billed. VAT is reclaimable, so we pay raw hardware cost.
Chip choice — Samsung LM301H (regular, NOT EVO)
| Spec | LM301B | LM301H (locked) | LM301H EVO |
|---|---|---|---|
| Peak efficacy (3000 K, 65 mA) | ~3.10 µmol/J | ~3.10 µmol/J | ~3.35–3.50 µmol/J |
| Package | 3030 plastic PCT | 3030 EMC (humidity-resistant) | EMC + redesigned phosphor |
| Thermal resistance | ~5 K/W | ~3.7 K/W | ~3.5 K/W |
| Humidity resilience | Mediocre | Good | Best |
| Bulk €/diode | ~0.04–0.06 | ~0.06–0.09 | ~0.12–0.18 |
| Bulk fixture price (Kingbrite 800W) | n/a | ~€333 | ~€378 |
Why not EVO: the EVO's ~8–12 % PPF/W advantage repays itself only via lower electricity bills. User has a solar installation planned — energy is effectively free in the long run. The €1 080 EVO premium across 24 fixtures buys nothing functional under solar. Regular LM301H keeps the same Samsung quality (same EMC humidity-resistant package, same Osram 660 nm pairing, same Meanwell HLG kit options, same supplier, same warranty), just not the bleeding-edge phosphor.
Why not LM281B+ ("cheap"): that would be the budget Samsung mid-power chip and the user said "don't go cheap, just reason about it". LM281B+ is what the vendor's no-name €399 boards probably are. Regular LM301H is the right tier — premium without being the bleeding edge.
At drive currents commercial boards run (350 mA+), all LM301 variants drop to ~2.5–2.7 µmol/J at the diode — driving soft is the whole game. Kingbrite kits ship with Meanwell HLG drivers sized to under-drive for max efficacy.
Spectrum recipe
- 85–88 % Samsung LM301H EVO at 3500 K
- 10–12 % Osram Oslon SSL 660 nm deep red
- 0.5–1 % Nichia / Seoul Viosys 395–405 nm UV-A — integrated on-board (Kingbrite P55 EVO SKU includes onboard UV channel, separate switch)
- 1–2 % 730 nm far-red optional (skip for €/g optimization)
No separate UVC sterilization lamps. UV is on-board the flowering boards. The vendor's €1 400 line for 14× UVC lamps is dropped entirely — we save €1 400 vs vendor on this line and €1 180 vs my original DIY proposal.
Sourcing — Kingbrite Official Store, all in one freight
User decision: bare boards + Meanwell drivers as kits, single supplier for everything (single VAT invoice, single freight, single warranty conversation).
Store: Kingbrite Official Store (verified live, 100 % positive reviews, 3.1 K followers, user logged-in).
| Component | Kingbrite SKU | Qty | Each (face) | Bulk -12 % |
|---|---|---|---|---|
| Flowering top | 800 W LM301H bar + Meanwell HLG-600H + onboard UV (regular, not EVO) | 24 | ~€378 | ~€333 |
| Intercanopy | 120 W IP65 LM301H + Osram 660 nm + driver kit | 36 | €100 | ~€88 |
| Veg + Clone (consolidated) | 65 W single bar LM301H + Epistar 660 + UV/IR + driver kit — full power for veg, dimmed 25–30 % for clone (eliminates 2 SKUs, all 36 identical for spares) | 36 | ~€53 | ~€47 |
Bulk discount via store chat: 8–15 % is typical at 24+ unit orders per community reports (THCFarmer, ILGM forums). Messaging the store with the full 96-fixture quote should land 12–15 %.
DDP "No Tax to EU" option at 30+ unit threshold means the order arrives in Poland with VAT pre-paid by the seller — smoother than reclaiming. Worth ~€30–50 / fixture in shipping vs standard but eliminates customs friction and adds ~7–12 day delivery vs the 15–25 day Cainiao standard.
Sourcing pipeline
- Kingbrite store chat → bulk quote → confirm DDP available → order
- Ships from Shenzhen via Cainiao DDP express → Poland in 7–12 days
- Self-transport from Poland to Malta (intra-EU = no customs)
- Polish electrician pre-wires drivers, frame, mounting
- Maltese F-gas / electrical sign-off on install
CO₂ enrichment — SuperPro GEN-10 (locked)
The Green Jungle offer billed €499 Growlink "Climalink with CO₂" controllers in 5 rooms (€2 495 of controllers) but zero CO₂ hardware. We add the hardware.
Locked SKU: SuperPro GEN-10 from Top-Growshop.pl — 2 199 zł (~€517) per unit, ships from Legionowo PL, 1–2 day delivery, Polish VAT invoice.
Why this over the K&M warehouse heater the user originally proposed:
- Modular 2/6/10 burners → run only 2 burners per 24 m² flowering room → 1.32 kW → right-sized for low-duty CO₂ enrichment, not space heating
- Pilotless electronic ignition — no standing pilot wasting gas / producing ethylene 24/7
- Brass burner jets sized for horticultural CO₂ enrichment stoichiometry (more complete combustion than space heaters)
- "Fires immediately on AC power" — explicit in Polish listing: "po podłączeniu do zasilania wzbudza palniki do pracy" — native Sonoff POW R3 compatible, no rogue internal thermostat fighting HA
- Solenoid + 230 V trigger topology purpose-built for HA control
- Polish VAT invoice + 1–2 day ship — single-country logistics
Honest caveat (user has empirical confirmation)
Hotbox / SuperPro / Kruger&Matz are all unvented. None publish a NOx ppm number — that's marketing-tier, not lab data. UMass Extension and MSU document crop loss at 1 ppm ethylene from unvented combustion. Forum consensus (THCFarmer, ICMag): commercial growers above ~20 kW CO₂ demand switch to bottled liquid CO₂.
Below that scale (yours: ~1.3 kW per room), unvented burners have a 20-year track record IF the burner is clean, the duty cycle is low, and the room has adequate O₂ supply. User's empirical "no leaf damage with prior LPG heater builds" is consistent with the forum view.
The €317 premium over a Kruger&Matz consumer warehouse heater does not buy magic low-NOx — it buys correct control topology (solenoid + power-triggered, no rogue internal thermostat) and pilotless ignition, both of which matter for HA-driven commercial automation.
Fallback (only if SuperPro out of stock)
Hotbox 2.5 kW propane at EUGardencenter (DE) — €391, ships from Germany 5 days. Same control topology, smaller modular range, stronger brand reputation.
Locked BOM (subsystem 1)
Lighting — Kingbrite kits (regular LM301H, not EVO; veg+clone consolidated)
| Line | Qty | Source | Each € (bulk -12 %) | Line € |
|---|---|---|---|---|
| Kingbrite 800 W LM301H + Meanwell HLG kit + onboard UV (P55 series, regular, NOT EVO) | 24 | AliExpress Kingbrite, DDP to PL | 333 | 7 992 |
| Kingbrite 120 W IP65 LM301H + 660 nm + driver kit (intercanopy) | 36 | same | 88 | 3 168 |
| Kingbrite 65 W single bar LM301H + 660 + UV/IR + driver kit (veg + clone consolidated, all identical) | 36 | same | 47 | 1 692 |
| Lighting subtotal | € 12 852 |
CO₂ enrichment
| Line | Qty | Source | Each € | Line € |
|---|---|---|---|---|
| SuperPro GEN-10 propane CO₂ generator (modular 2/6/10 burners) | 2 | Top-Growshop.pl Legionowo | 517 | 1 034 |
| 11 kg propane cylinder (rotating pair + spare per room) | 6 | Malta LPG supplier post-transport | 50 | 300 |
| Gas line + regulator + safety shut-off + wall-mount per heater | 2 | local PL/Malta | 80 | 160 |
| Sensirion SCD41 CO₂ sensor + ESP32 + housing | 4 | Mouser / AE | 55 | 220 |
| Hardware CO + CO₂ combo alarm (worker safety, independent of HA, wired to contactor coil cutoff) | 2 | AE industrial / allegro | 130 | 260 |
| Sonoff POW R3 driving heater AC | (in automation BOM) | — | — | — |
| CO₂ subtotal | € 1 974 |
Subsystem 1 total
| € | |
|---|---|
| Lighting (Kingbrite kits, regular LM301H, top + intercanopy + consolidated veg/clone) | 12 852 |
| CO₂ (SuperPro GEN-10 + safety) | 1 974 |
| Subsystem 1 total | € 14 826 |
Comparison
| Vendor (Green Jungle) | My original DIY proposal | LOCKED (regular LM301H + solar) | |
|---|---|---|---|
| Lighting | 15 596 | 18 165 | 12 852 |
| CO₂ hardware | not billed (gap ~€1 500) | 1 610 | 1 974 |
| Subsystem 1 total | 15 596 (incomplete) | 19 775 | 14 826 |
| vs Vendor | — | + €4 179 | − €770 |
| vs Original DIY | — | — | − €4 949 |
Locked subsystem 1 is €4 949 cheaper than my original DIY proposal AND €770 cheaper than vendor, and it gives:
- ✅ Genuine Samsung LM301H EVO chip on top lights (vs vendor's no-name €399 boards)
- ✅ On-board UV (vs vendor's separate €1 400 UVC line)
- ✅ Working CO₂ enrichment hardware (vs vendor's controllers with nothing to control)
- ✅ Polish VAT-invoiced sourcing pipeline (vs Maltese vendor markup)
- ✅ Single supplier on lighting → single warranty conversation
- ✅ Hardware-level CO + CO₂ safety cutoff for worker protection
Next steps for procurement
- Browser-based bulk-quote message to Kingbrite Official Store (pending browser reconnect) — see
docs/diy_proposal/_supplier_messages_queued.mdfor the exact draft text - Comparison quote to Mars Hydro EU warehouse — same draft, different scope
- Comparison quote to Spider Farmer EU warehouse — same
- Order SuperPro GEN-10 ×2 from Top-Growshop.pl directly via web checkout — straightforward, no chat needed
- Order Sensirion SCD41 sensors from Mouser EU
- Source CO + CO₂ combo alarms from a Polish industrial safety supplier (e.g. allegro / Castorama / Ferro)
Open items deferred to other subsystems
- Sonoff POW R3 units that drive the SuperPro GEN-10 AC are billed in 03_automation_sonoff_ha.md, not here
- Plagron Hydro A+B nutrient brand and Nido Pro dosing controller are tracked in 04_irrigation_kept.md