Luminor Blackcomb LB5-151
#2 in Up to 12 GPMFull review
A well built Canadian unit with an honest 12 GPM rating at the full dose, for a typical well home. Buy the LB6 version if you want a sensor from day one.
Amazon $840.15$840.15
The Luminor Blackcomb LB5-151 is the better UV water purifier overall, rated 2.7 to 2.2. The Luminor Blackcomb LB5-151 leads on certification, warranty and monitoring. The iSpring UVF55FS costs $540.25 less ($299.90 vs $840.15).
iSpring UVF55FS
#9 in Up to 12 GPMFull review
A popular budget point of entry UV for a well that already has sediment filtration. Fine as a backstop, but nothing tells you the dose is being met.
Amazon $299.90$299.90
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Luminor Blackcomb LB5-151 for certification (not NSF/ANSI 55 certified; flow rated at a stated 40 mJ/cm² dose vs not NSF/ANSI 55 certified, and no UV dose published), warranty (3-year warranty vs 1-year warranty) and monitoring (lamp failure alarm, lamp change countdown vs lamp failure alarm).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 12 GPM UV water purifier; a clear win is highlighted. How we rank explains each one.
| Factor weight | Luminor Blackcomb LB5-151 | iSpring UVF55FS |
|---|---|---|
| Overall rating | 2.7/5 | 2.2/5 |
| Value 25% | 54 $70.01 per GPM ($840.15, 12 GPM at 40 mJ/cm²) | 58 $62.48 per GPM ($299.90, 4.8 GPM at 40 mJ/cm², from 12 GPM at an unstated dose taken as 16) |
| Certification 20% | 30 not NSF/ANSI 55 certified; flow rated at a stated 40 mJ/cm² dose | 0 not NSF/ANSI 55 certified, and no UV dose published |
| Monitoring 20% | 40 lamp failure alarm, lamp change countdown | 30 lamp failure alarm |
| Lamp life 10% | 6 9,000 hour mercury lamp | 6 9,000 hour mercury lamp |
| Warranty 25% | 22 3-year warranty | 0 1-year warranty |
Specifications
| Luminor Blackcomb LB5-151 | iSpring UVF55FS | |
|---|---|---|
| Disinfection | ||
| Rated flow | 12 GPM at 40 mJ/cm² | 12 GPM |
| NSF/ANSI 55 | No | No |
| Lamp | Mercury | Mercury |
| Lamp power | 50 W | 55 W |
| Lamp life | 9,000 hours | 9,000 hours |
| Monitoring | ||
| UV intensity sensor | No | No |
| Lamp failure alarm | Yes | Yes |
| Lamp change countdown | Yes | - |
| Shutoff valve | No | No |
| Build | ||
| Chamber | 304 stainless steel | 304 stainless steel |
| Ports | 1 in | 1 in |
| Maximum pressure | 150 psi | 85 psi |
| Voltage | 120 V | 120 V |
| Warranty | 3 years | 1 year |