水草情迷

從舊貼文得知通常比例是1L:1W。但它是指pl、t5或t8呢？
我們追求照明的基本要求是光度，光度可以用多少單位"lux"去衡量。w只是指出燈具的耗電量。用同一種燈具，如pl 大w數的比細w數的光，即lux值較大。而同一w數(或較接近w數)的pl、t5及t8其lux值可相差達3倍。所以我很想知道這個1L:1W的比例是指那一種光管或燈具。

1w:1L

依個係一個俾大家參考的大概比例

其實冇一條公式可以計出一個缸要用咩燈,咩火數,因為實在有太多變數,例如:缸的高度,水面有/冇油膜,水面是否有水流令光不能直接射入水,種咩草..........好多好多原因.

最緊要都係你插條草落缸,觀察下條草是否生長得健康.

I think ngtony999 is quite correct.
In my case, my old tank is 30L, accorading to "以Lumen為單位計算草缸所需光量..."
I only need 1 24w T5HO, but I found that the results is not good.
So I used 2x 24w, and interesting find that when I use 3x 24w, the bubbles is very very much. but a lot of 藻 comming out.

So you need to try try...