I never really understood the difference between say Sylvania HPS bulbs ($20) vs a high end Ushio Hilux Gro ($100+). The only difference I can really see is just a bit more lumens. But is $80 really worth it?
Take a look at specs:
Sylvania 1000 Watt EPA Compliant HPS bulb
- E25 bulb with E39 mogul base
- EPA TCLP Compliant for non-hazardous waste
- Operates on S52 1000W HPS ballast
- Universal operating position
- Initial Lumens: 140,000
- 2100K color spectrum, see spectral image below
- 1-year lamp warranty
Hilux Gro
- Operates on S52 1000W HPS ballast
- Initial Lumens: 146,000
- 2100K color spectrum, see spectral image below
- 1-year lamp warranty
The spectrum graphs look nearly identical to me. Is there REALLY a difference between these that justify the price tag? I could get 6 of the Sylvanias for nearly the price of one HiLux.
I see this post through google by accident, I cannot help myself, I must make you clear.
I am from a China manufacture OEM bulbs for Sylvania and Philips. Let me tell you guys the different.
The above spectrum are 3 different 1000w HPS arc tube,
1. high lumen output HPS for lighting, I can make it with more than 160000lm if i want.
2. Philips master green power
3. improved by my self
Do you find any different only by compare the pictures? I show you the data by every wavelength, let compare the 1.high lumen and 2 Philips
Wavelength [nm]
| Spectral Irradiance [W/(sqm*nm)]
| Spectral Irradiance [W/(sqm*nm)]
|
380 | 1.11104E-03 | 7.74607E-04 |
381 | 1.39427E-03 | 8.29756E-04 |
382 | 1.82145E-03 | 1.19441E-03 |
383 | 1.70392E-03 | 8.58101E-04 |
384 | 1.56583E-03 | 3.91679E-04 |
385 | 1.92497E-03 | 5.36793E-04 |
386 | 1.91326E-03 | 8.54807E-04 |
387 | 1.48453E-03 | 1.01650E-03 |
388 | 1.52233E-03 | 1.01576E-03 |
389 | 1.74994E-03 | 1.05266E-03 |
390 | 1.75805E-03 | 1.28828E-03 |
391 | 2.02389E-03 | 1.59249E-03 |
392 | 2.41206E-03 | 1.72479E-03 |
393 | 2.19429E-03 | 1.49677E-03 |
394 | 1.76285E-03 | 1.16823E-03 |
395 | 1.74257E-03 | 1.05185E-03 |
396 | 2.11692E-03 | 1.16923E-03 |
397 | 2.53210E-03 | 1.47765E-03 |
398 | 2.45610E-03 | 1.85750E-03 |
399 | 2.21631E-03 | 2.03274E-03 |
400 | 2.23233E-03 | 1.83844E-03 |
401 | 2.31056E-03 | 1.73067E-03 |
402 | 2.39742E-03 | 2.03031E-03 |
403 | 2.61676E-03 | 2.67064E-03 |
404 | 2.81193E-03 | 3.12881E-03 |
405 | 2.77910E-03 | 2.98442E-03 |
406 | 2.67004E-03 | 2.78951E-03 |
407 | 2.59444E-03 | 2.76257E-03 |
408 | 2.68067E-03 | 2.72818E-03 |
409 | 2.79265E-03 | 2.69689E-03 |
410 | 2.77330E-03 | 2.76146E-03 |
411 | 2.84297E-03 | 2.93161E-03 |
412 | 2.97654E-03 | 3.06581E-03 |
413 | 2.82849E-03 | 2.91230E-03 |
414 | 2.70210E-03 | 2.75866E-03 |
415 | 3.08786E-03 | 2.96288E-03 |
416 | 3.77156E-03 | 3.02542E-03 |
417 | 4.27070E-03 | 2.94476E-03 |
418 | 4.03187E-03 | 3.43043E-03 |
419 | 3.61754E-03 | 3.91777E-03 |
420 | 3.74766E-03 | 3.59607E-03 |
421 | 3.74567E-03 | 3.16874E-03 |
422 | 3.38965E-03 | 3.20455E-03 |
423 | 3.40139E-03 | 3.65147E-03 |
424 | 3.75437E-03 | 4.15228E-03 |
425 | 4.05385E-03 | 4.31781E-03 |
426 | 4.23794E-03 | 4.18278E-03 |
427 | 4.33712E-03 | 4.03778E-03 |
428 | 4.28881E-03 | 4.17849E-03 |
429 | 4.24867E-03 | 4.49940E-03 |
430 | 4.39783E-03 | 4.70004E-03 |
431 | 4.56699E-03 | 4.83505E-03 |
432 | 4.73513E-03 | 5.09978E-03 |
433 | 5.05190E-03 | 5.61226E-03 |
434 | 5.39912E-03 | 6.09691E-03 |
435 | 5.63104E-03 | 6.26238E-03 |
436 | 5.68331E-03 | 6.10232E-03 |
437 | 5.71436E-03 | 5.89290E-03 |
438 | 6.02168E-03 | 6.05617E-03 |
439 | 6.32718E-03 | 6.35627E-03 |
440 | 6.13980E-03 | 6.29252E-03 |
441 | 5.53373E-03 | 5.93007E-03 |
442 | 4.83517E-03 | 5.49684E-03 |
443 | 4.44295E-03 | 5.19596E-03 |
444 | 4.35241E-03 | 5.04676E-03 |
445 | 4.51323E-03 | 5.12111E-03 |
446 | 5.20443E-03 | 5.61841E-03 |
447 | 6.50330E-03 | 6.75466E-03 |
448 | 8.05025E-03 | 8.62224E-03 |
449 | 9.23883E-03 | 1.03262E-02 |
450 | 9.55271E-03 | 1.07803E-02 |
451 | 9.27479E-03 | 1.04425E-02 |
452 | 8.67125E-03 | 9.73167E-03 |
453 | 7.78772E-03 | 8.57821E-03 |
454 | 6.66148E-03 | 7.15928E-03 |
455 | 5.41757E-03 | 5.88347E-03 |
456 | 4.40303E-03 | 5.30292E-03 |
457 | 3.76650E-03 | 5.23345E-03 |
458 | 3.50743E-03 | 4.66607E-03 |
459 | 3.49852E-03 | 3.99358E-03 |
460 | 3.58812E-03 | 4.11317E-03 |
461 | 3.99766E-03 | 4.87832E-03 |
462 | 4.89072E-03 | 5.81664E-03 |
463 | 6.35119E-03 | 6.59445E-03 |
464 | 9.36773E-03 | 8.69460E-03 |
465 | 1.44053E-02 | 1.34027E-02 |
466 | 1.85965E-02 | 1.77448E-02 |
467 | 2.00624E-02 | 1.96106E-02 |
468 | 1.85098E-02 | 1.86533E-02 |
469 | 1.48647E-02 | 1.55306E-02 |
470 | 1.09800E-02 | 1.18622E-02 |
471 | 7.82302E-03 | 8.84494E-03 |
472 | 6.01304E-03 | 7.09241E-03 |
473 | 6.03446E-03 | 6.70287E-03 |
474 | 6.75133E-03 | 6.95812E-03 |
475 | 6.52281E-03 | 6.79455E-03 |
476 | 5.48977E-03 | 5.62969E-03 |
477 | 4.20689E-03 | 3.84335E-03 |
478 | 3.15244E-03 | 2.83562E-03 |
479 | 2.40073E-03 | 2.43918E-03 |
480 | 1.83957E-03 | 1.81689E-03 |
481 | 1.56147E-03 | 1.29225E-03 |
482 | 1.54849E-03 | 1.15071E-03 |
483 | 1.56859E-03 | 1.24437E-03 |
484 | 1.57346E-03 | 1.32514E-03 |
485 | 1.63516E-03 | 1.23776E-03 |
486 | 1.74872E-03 | 1.23225E-03 |
487 | 1.90737E-03 | 1.51048E-03 |
488 | 2.14995E-03 | 2.05844E-03 |
489 | 2.54528E-03 | 2.54367E-03 |
490 | 3.05764E-03 | 2.63137E-03 |
491 | 3.39153E-03 | 2.72393E-03 |
492 | 3.54238E-03 | 3.01529E-03 |
493 | 4.11713E-03 | 3.42147E-03 |
494 | 7.16791E-03 | 5.92765E-03 |
495 | 1.50311E-02 | 1.30608E-02 |
496 | 2.84027E-02 | 2.53007E-02 |
497 | 4.30748E-02 | 3.88235E-02 |
498 | 4.92516E-02 | 4.50330E-02 |
499 | 4.58483E-02 | 4.28566E-02 |
500 | 3.66996E-02 | 3.53380E-02 |
501 | 2.55335E-02 | 2.49168E-02 |
502 | 1.56741E-02 | 1.48415E-02 |
503 | 8.92491E-03 | 8.37474E-03 |
504 | 5.19414E-03 | 5.22747E-03 |
505 | 3.58861E-03 | 3.71367E-03 |
506 | 3.06103E-03 | 3.00479E-03 |
507 | 2.85785E-03 | 2.62929E-03 |
508 | 2.68269E-03 | 2.40648E-03 |
509 | 2.45445E-03 | 2.29545E-03 |
510 | 2.31764E-03 | 2.34266E-03 |
511 | 2.70554E-03 | 2.59219E-03 |
512 | 4.17445E-03 | 3.68861E-03 |
513 | 7.14978E-03 | 6.65502E-03 |
514 | 1.04034E-02 | 1.00164E-02 |
515 | 1.21675E-02 | 1.16269E-02 |
516 | 1.16379E-02 | 1.10331E-02 |
517 | 9.35774E-03 | 8.87641E-03 |
518 | 6.84470E-03 | 6.41255E-03 |
519 | 4.77808E-03 | 4.45771E-03 |
520 | 3.40294E-03 | 3.33782E-03 |
521 | 2.79715E-03 | 2.59814E-03 |
522 | 2.68602E-03 | 2.12325E-03 |
523 | 2.53410E-03 | 2.17419E-03 |
524 | 2.46764E-03 | 2.41304E-03 |
525 | 2.69025E-03 | 2.45727E-03 |
526 | 2.86915E-03 | 2.43201E-03 |
527 | 2.80169E-03 | 2.39729E-03 |
528 | 2.54311E-03 | 2.30347E-03 |
529 | 2.42087E-03 | 2.37141E-03 |
530 | 2.65307E-03 | 2.69494E-03 |
531 | 2.87807E-03 | 2.75876E-03 |
532 | 2.93005E-03 | 2.54393E-03 |
533 | 2.93255E-03 | 2.52544E-03 |
534 | 2.97876E-03 | 2.69351E-03 |
535 | 3.11922E-03 | 2.86589E-03 |
536 | 3.22506E-03 | 2.80287E-03 |
537 | 3.24178E-03 | 2.75126E-03 |
538 | 3.23034E-03 | 3.20956E-03 |
539 | 3.25334E-03 | 3.54728E-03 |
540 | 3.38831E-03 | 3.34051E-03 |
541 | 3.69103E-03 | 3.31982E-03 |
542 | 4.11683E-03 | 3.79119E-03 |
543 | 4.59111E-03 | 4.58523E-03 |
544 | 5.19785E-03 | 5.29533E-03 |
545 | 5.97954E-03 | 5.86325E-03 |
546 | 6.87530E-03 | 7.02853E-03 |
547 | 8.14609E-03 | 8.84876E-03 |
548 | 1.02151E-02 | 1.09366E-02 |
549 | 1.29266E-02 | 1.33774E-02 |
550 | 1.60069E-02 | 1.63202E-02 |
551 | 1.93120E-02 | 1.98565E-02 |
552 | 2.25863E-02 | 2.42792E-02 |
553 | 2.56599E-02 | 2.98419E-02 |
554 | 2.98505E-02 | 3.68538E-02 |
555 | 3.63480E-02 | 4.59699E-02 |
556 | 4.54605E-02 | 5.82404E-02 |
557 | 5.56209E-02 | 7.22978E-02 |
558 | 6.48090E-02 | 8.56538E-02 |
559 | 7.32597E-02 | 9.70565E-02 |
560 | 8.05965E-02 | 1.05683E-01 |
561 | 8.50870E-02 | 1.11135E-01 |
562 | 8.71350E-02 | 1.14061E-01 |
563 | 8.84476E-02 | 1.15452E-01 |
564 | 9.21708E-02 | 1.17377E-01 |
565 | 1.05363E-01 | 1.26380E-01 |
566 | 1.34944E-01 | 1.49166E-01 |
567 | 1.69361E-01 | 1.77938E-01 |
568 | 1.90971E-01 | 1.98707E-01 |
569 | 1.92892E-01 | 2.00974E-01 |
570 | 1.77074E-01 | 1.85533E-01 |
571 | 1.53909E-01 | 1.65694E-01 |
572 | 1.31352E-01 | 1.47536E-01 |
573 | 1.15435E-01 | 1.34064E-01 |
574 | 1.08050E-01 | 1.27703E-01 |
575 | 1.08420E-01 | 1.28361E-01 |
576 | 1.13484E-01 | 1.33090E-01 |
577 | 1.20250E-01 | 1.39078E-01 |
578 | 1.27432E-01 | 1.45005E-01 |
579 | 1.36866E-01 | 1.51918E-01 |
580 | 1.48034E-01 | 1.59472E-01 |
581 | 1.59088E-01 | 1.66758E-01 |
582 | 1.69321E-01 | 1.71253E-01 |
583 | 1.77230E-01 | 1.71059E-01 |
584 | 1.77563E-01 | 1.65300E-01 |
585 | 1.63959E-01 | 1.48365E-01 |
586 | 1.35544E-01 | 1.17240E-01 |
587 | 1.00056E-01 | 8.17191E-02 |
588 | 6.60377E-02 | 5.10650E-02 |
589 | 4.38771E-02 | 3.05418E-02 |
590 | 4.05152E-02 | 2.35655E-02 |
591 | 5.76749E-02 | 3.12679E-02 |
592 | 8.87045E-02 | 5.13286E-02 |
593 | 1.24668E-01 | 7.95685E-02 |
594 | 1.57002E-01 | 1.10442E-01 |
595 | 1.79358E-01 | 1.38395E-01 |
596 | 1.88896E-01 | 1.58943E-01 |
597 | 1.90621E-01 | 1.72286E-01 |
598 | 1.88697E-01 | 1.79714E-01 |
599 | 1.83410E-01 | 1.82694E-01 |
600 | 1.75091E-01 | 1.81694E-01 |
601 | 1.66235E-01 | 1.78563E-01 |
602 | 1.57831E-01 | 1.74340E-01 |
603 | 1.49832E-01 | 1.69288E-01 |
604 | 1.41798E-01 | 1.63486E-01 |
605 | 1.34354E-01 | 1.58243E-01 |
606 | 1.27870E-01 | 1.54128E-01 |
607 | 1.22188E-01 | 1.49542E-01 |
608 | 1.16651E-01 | 1.43616E-01 |
609 | 1.10756E-01 | 1.37481E-01 |
610 | 1.05788E-01 | 1.32736E-01 |
611 | 1.02486E-01 | 1.29590E-01 |
612 | 1.00747E-01 | 1.27498E-01 |
613 | 1.03038E-01 | 1.28806E-01 |
614 | 1.11858E-01 | 1.36067E-01 |
615 | 1.18633E-01 | 1.41293E-01 |
616 | 1.15953E-01 | 1.37895E-01 |
617 | 1.06982E-01 | 1.29614E-01 |
618 | 9.55085E-02 | 1.19625E-01 |
619 | 8.46767E-02 | 1.09680E-01 |
620 | 7.63844E-02 | 1.01231E-01 |
621 | 7.10798E-02 | 9.51321E-02 |
622 | 6.77288E-02 | 9.18299E-02 |
623 | 6.51929E-02 | 8.97485E-02 |
624 | 6.30210E-02 | 8.70383E-02 |
625 | 6.11513E-02 | 8.43007E-02 |
626 | 5.95503E-02 | 8.21815E-02 |
627 | 5.81812E-02 | 8.04301E-02 |
628 | 5.66626E-02 | 7.86125E-02 |
629 | 5.47073E-02 | 7.64820E-02 |
630 | 5.31498E-02 | 7.46344E-02 |
631 | 5.20270E-02 | 7.29304E-02 |
632 | 5.05174E-02 | 7.08088E-02 |
633 | 4.86106E-02 | 6.88288E-02 |
634 | 4.67646E-02 | 6.76265E-02 |
635 | 4.55535E-02 | 6.63527E-02 |
636 | 4.51270E-02 | 6.49960E-02 |
637 | 4.46167E-02 | 6.39878E-02 |
638 | 4.37509E-02 | 6.29594E-02 |
639 | 4.26966E-02 | 6.14860E-02 |
640 | 4.20215E-02 | 6.01446E-02 |
641 | 4.15004E-02 | 5.93280E-02 |
642 | 4.02189E-02 | 5.88767E-02 |
643 | 3.88587E-02 | 5.79037E-02 |
644 | 3.81613E-02 | 5.60434E-02 |
645 | 3.74470E-02 | 5.43703E-02 |
646 | 3.65415E-02 | 5.31499E-02 |
647 | 3.60592E-02 | 5.23581E-02 |
648 | 3.57658E-02 | 5.21280E-02 |
649 | 3.51297E-02 | 5.17950E-02 |
650 | 3.41560E-02 | 5.00696E-02 |
651 | 3.33439E-02 | 4.80378E-02 |
652 | 3.30876E-02 | 4.74941E-02 |
653 | 3.29068E-02 | 4.71951E-02 |
654 | 3.24240E-02 | 4.63533E-02 |
655 | 3.18890E-02 | 4.61258E-02 |
656 | 3.16401E-02 | 4.63172E-02 |
657 | 3.16027E-02 | 4.58413E-02 |
658 | 3.11163E-02 | 4.48938E-02 |
659 | 2.99954E-02 | 4.37678E-02 |
660 | 2.87308E-02 | 4.24580E-02 |
661 | 2.77871E-02 | 4.13744E-02 |
662 | 2.73703E-02 | 4.07999E-02 |
663 | 2.72771E-02 | 4.03819E-02 |
664 | 2.72824E-02 | 3.98583E-02 |
665 | 2.71205E-02 | 3.91347E-02 |
666 | 2.68208E-02 | 3.91715E-02 |
667 | 2.66490E-02 | 4.03057E-02 |
668 | 2.69782E-02 | 4.05061E-02 |
669 | 2.76307E-02 | 3.99157E-02 |
670 | 2.78687E-02 | 4.00961E-02 |
671 | 2.74111E-02 | 4.00597E-02 |
672 | 2.64865E-02 | 3.90810E-02 |
673 | 2.61270E-02 | 3.86134E-02 |
674 | 2.62046E-02 | 3.87561E-02 |
675 | 2.58896E-02 | 3.85319E-02 |
676 | 2.50587E-02 | 3.71138E-02 |
677 | 2.39766E-02 | 3.49327E-02 |
678 | 2.30747E-02 | 3.38155E-02 |
679 | 2.22799E-02 | 3.32580E-02 |
680 | 2.15486E-02 | 3.21597E-02 |
681 | 2.10066E-02 | 3.06593E-02 |
682 | 2.04803E-02 | 2.92383E-02 |
683 | 1.93497E-02 | 2.81096E-02 |
684 | 1.82474E-02 | 2.70776E-02 |
685 | 1.78127E-02 | 2.59650E-02 |
686 | 1.73600E-02 | 2.51451E-02 |
687 | 1.67230E-02 | 2.46053E-02 |
688 | 1.63839E-02 | 2.40366E-02 |
689 | 1.62971E-02 | 2.35113E-02 |
690 | 1.61914E-02 | 2.30609E-02 |
691 | 1.59646E-02 | 2.26735E-02 |
692 | 1.57363E-02 | 2.23360E-02 |
693 | 1.55526E-02 | 2.18493E-02 |
694 | 1.52074E-02 | 2.12587E-02 |
695 | 1.47967E-02 | 2.09012E-02 |
696 | 1.46380E-02 | 2.09602E-02 |
697 | 1.46153E-02 | 2.09857E-02 |
698 | 1.44636E-02 | 2.05209E-02 |
699 | 1.41964E-02 | 2.01063E-02 |
700 | 1.39324E-02 | 1.99679E-02 |
701 | 1.39386E-02 | 1.99112E-02 |
702 | 1.38815E-02 | 1.96814E-02 |
703 | 1.34892E-02 | 1.91637E-02 |
704 | 1.33156E-02 | 1.85567E-02 |
705 | 1.33149E-02 | 1.81584E-02 |
706 | 1.29463E-02 | 1.83051E-02 |
707 | 1.24006E-02 | 1.84132E-02 |
708 | 1.20578E-02 | 1.79897E-02 |
709 | 1.21988E-02 | 1.75586E-02 |
710 | 1.23949E-02 | 1.72176E-02 |
711 | 1.20458E-02 | 1.68657E-02 |
712 | 1.18276E-02 | 1.68464E-02 |
713 | 1.20832E-02 | 1.71114E-02 |
714 | 1.21268E-02 | 1.68825E-02 |
715 | 1.17514E-02 | 1.61712E-02 |
716 | 1.12112E-02 | 1.54933E-02 |
717 | 1.10232E-02 | 1.51488E-02 |
718 | 1.11848E-02 | 1.51703E-02 |
719 | 1.11437E-02 | 1.53755E-02 |
720 | 1.10305E-02 | 1.55076E-02 |
721 | 1.11410E-02 | 1.54848E-02 |
722 | 1.11056E-02 | 1.53807E-02 |
723 | 1.09633E-02 | 1.51221E-02 |
724 | 1.11361E-02 | 1.46810E-02 |
725 | 1.10605E-02 | 1.45162E-02 |
726 | 1.05155E-02 | 1.47186E-02 |
727 | 1.04804E-02 | 1.44037E-02 |
728 | 1.07636E-02 | 1.37894E-02 |
729 | 1.05336E-02 | 1.36266E-02 |
730 | 1.01496E-02 | 1.34179E-02 |
731 | 9.96063E-03 | 1.29854E-02 |
732 | 9.79415E-03 | 1.28880E-02 |
733 | 9.58466E-03 | 1.29715E-02 |
734 | 9.40521E-03 | 1.28697E-02 |
735 | 9.41780E-03 | 1.27402E-02 |
736 | 9.60953E-03 | 1.25466E-02 |
737 | 9.74112E-03 | 1.19929E-02 |
738 | 9.76861E-03 | 1.15451E-02 |
739 | 9.72126E-03 | 1.16485E-02 |
740 | 9.39421E-03 | 1.17754E-02 |
741 | 8.94929E-03 | 1.14376E-02 |
742 | 8.83255E-03 | 1.06118E-02 |
743 | 8.89066E-03 | 1.02394E-02 |
744 | 8.86031E-03 | 1.05466E-02 |
745 | 8.62537E-03 | 1.03239E-02 |
746 | 8.35931E-03 | 9.74899E-03 |
747 | 8.26224E-03 | 9.60466E-03 |
748 | 8.28798E-03 | 9.77537E-03 |
749 | 8.37387E-03 | 9.96249E-03 |
750 | 8.50401E-03 | 9.91863E-03 |
751 | 8.78671E-03 | 9.87904E-03 |
752 | 9.10817E-03 | 9.94175E-03 |
753 | 8.79811E-03 | 9.47867E-03 |
754 | 8.03167E-03 | 8.68612E-03 |
755 | 7.65798E-03 | 8.44788E-03 |
756 | 7.42821E-03 | 8.58801E-03 |
757 | 7.09328E-03 | 8.69449E-03 |
758 | 7.03765E-03 | 8.61929E-03 |
759 | 7.02010E-03 | 8.34712E-03 |
760 | 6.70085E-03 | 8.04688E-03 |
761 | 6.85355E-03 | 8.00743E-03 |
762 | 7.15723E-03 | 7.90387E-03 |
763 | 6.40736E-03 | 7.08360E-03 |
764 | 1.09834E-02 | 9.41483E-03 |
765 | 2.45623E-02 | 1.71048E-02 |
766 | 3.38790E-02 | 2.20664E-02 |
767 | 3.36960E-02 | 2.12957E-02 |
768 | 2.99108E-02 | 1.86070E-02 |
769 | 2.86408E-02 | 1.72594E-02 |
770 | 2.98437E-02 | 1.73277E-02 |
771 | 2.30554E-02 | 1.38828E-02 |
772 | 1.18730E-02 | 8.59871E-03 |
773 | 7.30160E-03 | 6.58492E-03 |
774 | 7.05538E-03 | 6.69973E-03 |
775 | 7.22708E-03 | 7.02808E-03 |
776 | 6.66083E-03 | 6.92964E-03 |
777 | 6.41676E-03 | 6.70359E-03 |
778 | 7.74697E-03 | 6.84976E-03
|
779 | 9.30070E-03 | 6.89647E-03 |
780 | 9.81528E-03 | 6.77012E-03 |
left is high lumen right one is Philips, so just compare at 400nm-750nm, the red and bule light is much less than right one, insensitive green light is much more than right one. Which one is the real HPS grow light for hydroponic? of course Philips mastergreen, left one just for street lighting.
That's the different between 20$ and 134$
I design the 3. spectrum is better than Philips, but lumen only 120000lm. still need improve.