Se utilizan los w/litro por que lo mas utilizado por los acuaristas son los tubos fluorescentes pero es cierto que lo correcto seria utilizar lumenes litro.
Todos los fabricantes de productos de iluminación sean leds, hqi, tubos ... en sus hojas de características indican la cantidad de lúmenes que dan, el angulo que tiene la luz y la temperatura de color.
Los Watios solo son una medida de consumo nada mas, pero hasta ahora es una manera sencilla y rápida de saber la luz que tienes en tu acuario, a medida que otros productos como el led que emiten la luz de una forma muy diferente es posible que veamos otra forma de indicar la luz necesaria para un acuario.
Luego nos dices que has comprado tubos de 24w pero no dices la cantidad pero lo que mas me estraña es por que has cogido 8000kº vas a tener un espectro de luz que no van aprovechar las plantas y si algas.
Ademas deberías tener en cuenta que una cosa es la vida de un tubo y otra el rendimiento que tiene,nosotros cambiamos los tubos cada año aproximadamente pero no por que ya no funcionen si no por que baja la cantidad de luz que emiten.
Si te fijas el mismo fabricante te dice que tiene
Lifespan o duración de vida 24000 h
Service life o servicio de vida18000 h
Si echamos cuentas para 12 horas diarias
serian 5.47 años para el primero y 4.10 años para el segundo sin contar claro que cada 4 años hay uno bisiesto.
Y eso solo te lo da el fabricante si utilizas balastros con pre calentamiento electrónico, olvídate y utilizas balastros magnéticos.
Yo a mi modesto entender cambiaría los tubos con una temperatura mas apropiada y mientras sigas utilizando tubos fluorescentes sigue siendo valido la medida de W por litro.
T5HO 24W 8000K Osram Lumix Skywhite
product details:
HO 24 W/880
PDF
Product code: 4008321081469
Product description: HO 24 W/880
Miscellaneous: Further information and pictures available here
Applications
Suitable for indoor Yes
Categorizations
SEG number 8328607
Certificates & Standards
EEI – Energy Label A
General Description
Base (standard designation) G5
Recycling Yes
Rated lamp mercury content 1.9 mg
Technical – Electrical Data
Nominal wattage 24 W
Construction wattage 22.5 W
Rated lamp efficacy (standard condition) 86 lm/W
Rated lamp efficacy (HF data) Under clarification by authority and standardization body
Technical – Geometries
Tube diameter 16 mm
Diameter 16 mm
Length 549.00 mm
Length with base excl. base pins/connect 549 mm
Technical – Lifespan
Lifespan 24000 h 1)
Service life 18000 h 2)
Rated lamp survival factor at 2,000 h 0.99
Rated lamp survival factor at 4,000 h 0.99
Rated lamp survival factor at 6,000 h 0.99
Rated lamp survival factor at 8,000 h 0.99
Rated lamp survival factor at 12,000 h 0.99
Rated lamp survival factor at 16,000 h 0.95
Rated lamp survival factor at 20,000 h 0.81
Operation mode LLMF/LSF HF
Technical – Light Technical Data
Rated color rendering index Ra >=80
Luminous flux at 25 °C 1550 lm
Nominal luminous flux 1550 lm
Rated luminous flux 1550 lm
Luminous flux 1550 lm 3)
Luminous flux at 35 °C 1750 lm
Light color 880
Rated color temperature 8000 K
Color rendering index Ra 80…89
Light color as per EN 12464-1 LUMILUX SKYWHITE
Rated LLMF at 2,000 h 0.95
Rated LLMF at 4,000 h 0.92
Rated LLMF at 6,000 h 0.91
Rated LLMF at 8,000 h 0.90
Rated LLMF at 12,000 h 0.90
Rated LLMF at 16,000 h 0.89
Rated LLMF at 20,000 h 0.89
Technical – Temperatures
Rated ambient temp.w.max.luminous flux 35.0 °C
Packaging units
Product code Packaging unit
Pieces/ Unit Dimensions in h x w x l Gross weight Volume
4008321081469 Sleeves
(contains 1 Piece) 23,000 mm x 20,000 mm x 570,000 mm 67,500 g (0,000 g) 0,302 Cubic dec.
4008321081476 Shipping carton box
(contains 20 Piece) 110,000 mm x 90,000 mm x 587,000 mm 1.473,000 g (0,000 g) 5,811 Cubic dec.
HO stands for High Output. As in the case of T5 HE lamps, T5 HO fluorescent lamps produce their maximum luminous flux at 35 °C, compared with 25 °C for T8 fluorescent lamps with a tube diameter of 26 mm. Since the temperatures in the luminaire are higher than the ambient temperature (e.g. 20 to 25 °C) the efficiency is at least 5 % higher compared to T8 fluorescent lamps. The small tube diameter of 16 mm also leads to an increase in the efficiency of the luminaire.
This lamp system is particularly noted for its very high luminous flux, opening up new areas of application for the fluorescent lamp such as lighting for rooms with high ceilings.
HO lamps are designed for ECG operation and, like all LUMILUX lamps from OSRAM, are ideal in systems with motion sensors and/or daylight dimmers to reduced energy consumption to a minimum. With hot restart ECGs, T5 HO lamps achieve an average life of 24,000 hours and a service life of 18,000 hours.
For more information on the system guarantee and the terms and conditions of the guarantee go to www.osram.com/system-guarantee.
1) With preheat ECG
2) With preheat ECG
3) These values are reached at 25 °C (acc. to IEC 60081). These lamps offer even more luminous flux if they are operated within the luminaire at their optimum ambient temperature (35 °C).